Maison Opération et maintenance exploitation et maintenance Linux Devoirs pour la première semaine d'apprentissage du développement automatisé Python --- menu à trois niveaux

Devoirs pour la première semaine d'apprentissage du développement automatisé Python --- menu à trois niveaux

Jul 13, 2017 pm 06:16 PM
python 自动化

Exigences du travail :
(1) Exécutez le programme pour afficher le menu de premier niveau
(2) Sélectionnez un élément dans le menu de premier niveau et affichez le menu de deuxième niveau, et affichez de la même manière le troisième -menu de niveau
(3) Laisser L'utilisateur choisit de quitter ou non
(4) Il existe une fonction pour revenir au menu précédent

<span style="color: #008080">  1</span> data =<span style="color: #000000"> {
</span><span style="color: #008080">  2</span>     <span style="color: #800000">"</span><span style="color: #800000">天津</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080">  3</span>         <span style="color: #800000">"</span><span style="color: #800000">南开区</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080">  4</span>             <span style="color: #800000">"</span><span style="color: #800000">南开大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080">  5</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080">  6</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080">  7</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080">  8</span> <span style="color: #000000">            },
</span><span style="color: #008080">  9</span>             <span style="color: #800000">"</span><span style="color: #800000">科技大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 10</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 11</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 12</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 13</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 14</span>             <span style="color: #800000">"</span><span style="color: #800000">理工大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 15</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 16</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 17</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 18</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 19</span> <span style="color: #000000">        },
</span><span style="color: #008080"> 20</span>         <span style="color: #800000">"</span><span style="color: #800000">武清区</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 21</span>             <span style="color: #800000">"</span><span style="color: #800000">武清大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 22</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 23</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 24</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 25</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 26</span>             <span style="color: #800000">"</span><span style="color: #800000">武清科技大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 27</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 28</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 29</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 30</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 31</span>             <span style="color: #800000">"</span><span style="color: #800000">武清理工大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 32</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 33</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 34</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 35</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 36</span> <span style="color: #000000">        },
</span><span style="color: #008080"> 37</span>         <span style="color: #800000">"</span><span style="color: #800000">北辰区</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 38</span>             <span style="color: #800000">"</span><span style="color: #800000">北辰大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 39</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 40</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 41</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 42</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 43</span>             <span style="color: #800000">"</span><span style="color: #800000">北辰科技大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 44</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 45</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 46</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 47</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 48</span>             <span style="color: #800000">"</span><span style="color: #800000">北辰理工大学</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 49</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 50</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 51</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">:{},
</span><span style="color: #008080"> 52</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 53</span> <span style="color: #000000">        },
</span><span style="color: #008080"> 54</span> <span style="color: #000000">    },
</span><span style="color: #008080"> 55</span>     <span style="color: #800000">"</span><span style="color: #800000">河北</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080"> 56</span>         <span style="color: #800000">"</span><span style="color: #800000">保定市</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 57</span>             <span style="color: #800000">"</span><span style="color: #800000">保定大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 58</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 59</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 60</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 61</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 62</span>             <span style="color: #800000">"</span><span style="color: #800000">保定科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 63</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 64</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 65</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 66</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 67</span>             <span style="color: #800000">"</span><span style="color: #800000">保定理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 68</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 69</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 70</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 71</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 72</span> <span style="color: #000000">        },
</span><span style="color: #008080"> 73</span>         <span style="color: #800000">"</span><span style="color: #800000">秦皇岛</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 74</span>             <span style="color: #800000">"</span><span style="color: #800000">秦皇岛大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 75</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 76</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 77</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 78</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 79</span>             <span style="color: #800000">"</span><span style="color: #800000">秦皇岛科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 80</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 81</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 82</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 83</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 84</span>             <span style="color: #800000">"</span><span style="color: #800000">秦皇岛理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 85</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 86</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 87</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 88</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 89</span> <span style="color: #000000">        },
</span><span style="color: #008080"> 90</span>         <span style="color: #800000">"</span><span style="color: #800000">石家庄</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 91</span>             <span style="color: #800000">"</span><span style="color: #800000">石家庄大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 92</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 93</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 94</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 95</span> <span style="color: #000000">            },
</span><span style="color: #008080"> 96</span>             <span style="color: #800000">"</span><span style="color: #800000">石家庄科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080"> 97</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 98</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080"> 99</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">100</span> <span style="color: #000000">            },
</span><span style="color: #008080">101</span>             <span style="color: #800000">"</span><span style="color: #800000">石家庄理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">102</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">103</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">104</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">105</span> <span style="color: #000000">            },
</span><span style="color: #008080">106</span> <span style="color: #000000">        },
</span><span style="color: #008080">107</span> <span style="color: #000000">    },
</span><span style="color: #008080">108</span>     <span style="color: #800000">"</span><span style="color: #800000">河南</span><span style="color: #800000">"</span><span style="color: #000000">:{
</span><span style="color: #008080">109</span>         <span style="color: #800000">"</span><span style="color: #800000">郑州市</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">110</span>             <span style="color: #800000">"</span><span style="color: #800000">郑州大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">111</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">112</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">113</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">114</span> <span style="color: #000000">            },
</span><span style="color: #008080">115</span>             <span style="color: #800000">"</span><span style="color: #800000">郑州科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">116</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">117</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">118</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">119</span> <span style="color: #000000">            },
</span><span style="color: #008080">120</span>             <span style="color: #800000">"</span><span style="color: #800000">郑州理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">121</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">122</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">123</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">124</span> <span style="color: #000000">            },
</span><span style="color: #008080">125</span> <span style="color: #000000">        },
</span><span style="color: #008080">126</span>         <span style="color: #800000">"</span><span style="color: #800000">南阳市</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">127</span>             <span style="color: #800000">"</span><span style="color: #800000">南阳大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">128</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">129</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">130</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">131</span> <span style="color: #000000">            },
</span><span style="color: #008080">132</span>             <span style="color: #800000">"</span><span style="color: #800000">南阳科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">133</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">134</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">135</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">136</span> <span style="color: #000000">            },
</span><span style="color: #008080">137</span>             <span style="color: #800000">"</span><span style="color: #800000">南阳理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">138</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">139</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">140</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">141</span> <span style="color: #000000">            },
</span><span style="color: #008080">142</span> <span style="color: #000000">        },
</span><span style="color: #008080">143</span>         <span style="color: #800000">"</span><span style="color: #800000">登封市</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">144</span>             <span style="color: #800000">"</span><span style="color: #800000">登封大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">145</span>                 <span style="color: #800000">"</span><span style="color: #800000">历史系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">146</span>                 <span style="color: #800000">"</span><span style="color: #800000">文学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">147</span>                 <span style="color: #800000">"</span><span style="color: #800000">英语系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">148</span> <span style="color: #000000">            },
</span><span style="color: #008080">149</span>             <span style="color: #800000">"</span><span style="color: #800000">登封科技大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">150</span>                 <span style="color: #800000">"</span><span style="color: #800000">计算机系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">151</span>                 <span style="color: #800000">"</span><span style="color: #800000">机器系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">152</span>                 <span style="color: #800000">"</span><span style="color: #800000">软件系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">153</span> <span style="color: #000000">            },
</span><span style="color: #008080">154</span>             <span style="color: #800000">"</span><span style="color: #800000">登封理工大学</span><span style="color: #800000">"</span><span style="color: #000000">: {
</span><span style="color: #008080">155</span>                 <span style="color: #800000">"</span><span style="color: #800000">数学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">156</span>                 <span style="color: #800000">"</span><span style="color: #800000">化学系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">157</span>                 <span style="color: #800000">"</span><span style="color: #800000">物理系</span><span style="color: #800000">"</span><span style="color: #000000">: {},
</span><span style="color: #008080">158</span> <span style="color: #000000">            },
</span><span style="color: #008080">159</span> <span style="color: #000000">        },
</span><span style="color: #008080">160</span> <span style="color: #000000">    },
</span><span style="color: #008080">161</span> <span style="color: #000000">}
</span><span style="color: #008080">162</span> <span style="color: #008000">#</span><span style="color: #008000">exit_flag = False</span>
<span style="color: #008080">163</span> <span style="color: #0000ff">while</span><span style="color: #000000"> True:
</span><span style="color: #008080">164</span>     <span style="color: #0000ff">for</span> i <span style="color: #0000ff">in</span><span style="color: #000000"> data :
</span><span style="color: #008080">165</span>         <span style="color: #0000ff">print</span><span style="color: #000000"> (i)
</span><span style="color: #008080">166</span>     choice = input (<span style="color: #800000">"</span><span style="color: #800000">input:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">167</span>     <span style="color: #0000ff">if</span> choice <span style="color: #0000ff">in</span><span style="color: #000000"> data:
</span><span style="color: #008080">168</span>         <span style="color: #0000ff">while</span><span style="color: #000000"> True:
</span><span style="color: #008080">169</span>             <span style="color: #0000ff">for</span> i2 <span style="color: #0000ff">in</span><span style="color: #000000"> data[choice]:
</span><span style="color: #008080">170</span>                 <span style="color: #0000ff">print</span><span style="color: #000000"> (i2)
</span><span style="color: #008080">171</span>             choice2 = input(<span style="color: #800000">"</span><span style="color: #800000">input2:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">172</span>             <span style="color: #0000ff">if</span> choice2 <span style="color: #0000ff">in</span><span style="color: #000000"> data[choice]:
</span><span style="color: #008080">173</span>                 <span style="color: #0000ff">while</span><span style="color: #000000"> True:
</span><span style="color: #008080">174</span>                     <span style="color: #0000ff">for</span> i3 <span style="color: #0000ff">in</span><span style="color: #000000"> data[choice][choice2]:
</span><span style="color: #008080">175</span>                         <span style="color: #0000ff">print</span><span style="color: #000000"> (i3)
</span><span style="color: #008080">176</span>                     choice3 = input(<span style="color: #800000">"</span><span style="color: #800000">input3:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">177</span>                     <span style="color: #0000ff">if</span> choice3 <span style="color: #0000ff">in</span><span style="color: #000000"> data[choice][choice2]:
</span><span style="color: #008080">178</span>                         <span style="color: #0000ff">for</span> i4 <span style="color: #0000ff">in</span><span style="color: #000000"> data[choice][choice2][choice3]:
</span><span style="color: #008080">179</span>                             <span style="color: #0000ff">print</span><span style="color: #000000">(i4)
</span><span style="color: #008080">180</span>                         choice4 = input(<span style="color: #800000">"</span><span style="color: #800000">Press b to return to the previous level:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">181</span>                         <span style="color: #0000ff">if</span> choice4 == <span style="color: #800000">"</span><span style="color: #800000">b</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">182</span>                             <span style="color: #0000ff">pass</span>
<span style="color: #008080">183</span>                         <span style="color: #0000ff">elif</span> choice4 == <span style="color: #800000">"</span><span style="color: #800000">q</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">184</span> <span style="color: #000000">                            exit ()
</span><span style="color: #008080">185</span>                     <span style="color: #0000ff">if</span> choice3 == <span style="color: #800000">"</span><span style="color: #800000">b</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">186</span>                         <span style="color: #0000ff">break</span>
<span style="color: #008080">187</span>                     <span style="color: #0000ff">elif</span> choice3 == <span style="color: #800000">"</span><span style="color: #800000">q</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">188</span> <span style="color: #000000">                        exit()
</span><span style="color: #008080">189</span>             <span style="color: #0000ff">if</span> choice2 == <span style="color: #800000">"</span><span style="color: #800000">b</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">190</span>                 <span style="color: #0000ff">break</span>
<span style="color: #008080">191</span>             <span style="color: #0000ff">elif</span> choice2 == <span style="color: #800000">"</span><span style="color: #800000">q</span><span style="color: #800000">"</span><span style="color: #000000">:
</span><span style="color: #008080">192</span>                 exit()
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