The difference between python single quotes, double quotes, and triple quotes

The difference between single quotes, double quotes, and triple quotes in python

1 Common usage of single quotes and double quotes It is the same as the use of double quotes to represent string literals in C language.

eg:

(1) str1 = 'aaa' (等价于str = "aaa")
　　(2) str2 = 'aaa,\
　　bbb'
　　(等价于str2 = "aaa,\
　　bbb")

When printing str1 and str2, they are

　　aaa
　　aaa,bbb

2 respectively. The difference between quotation marks and double quotation marks is mainly reflected in the fact that when the string enclosed in single quotation marks contains ", there is no need to use the escape character (\), and vice versa

　　(1) str1 = 'aaa"bbb'
　　(2) str2 = "aaa'bbb"

Print str1, str2 respectively Yes

　　aaa"bbb
　　aaa'bbb

3 There are two forms of triple quotation marks ("""String content""", or '''String content''')

　<1>These two There is almost no difference in the usage of the form, but strictly speaking, there is the same difference as above

　　　str1 = '''aaa"""bbb'''(等价于"""aaa\"""bbb""")
　　　str2 = """aaa'''bbb"""(等价于'''aaa\'''bbb''')

　<2>The core usage of triple quotation marks is mainly reflected in cross-line strings, which will contain two delimiters All characters between symbols, including visible and invisible, such as carriage return and line feed characters

　　str1 = '''aaa
　　bbb'''

Print str1

　　aaa
　　bbb

Based on this feature of triple quotes, when formatting is required When entering multi-line characters, you can reduce the input of escape characters.

　<3>Also, there are no multi-line comment symbols in python, so triple quotes are generally used instead

Related recommendations:《 Python Tutorial》

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