How to use str in Python with zero basic knowledge

Tools/Materials

python3.1.6

pycharm

Methods/Steps

# For strings: Insert a certain string into the middle of all the characters in the following string and concatenate it into a new string. s = '**'.join('good123')print(s)

print('****************** Slice**********************')s = 'good_make_dog_love_pig'c = s[-1] # Query the corresponding character according to the subscript, if you count from the left, start from 0 start. If counting from the right, start from -1. print(c)

# s[x:y:z] Starting from the x-th character, query to the y-th character (excluding y), z is the step long, the default step size is 1. s = 'good_make_dog_love_pig'res = s[0:10:2]print(res, type(res))

s = 'good_make_dog_love_pig'# s[x:y :z] Starting from the x-th character, query to the y-th character (excluding y), z is the step size, and the default step size is 1. res = s[0:10:2]print(res, type(res))

res = s[-1::-1] # The step size is a negative number , which means querying from right to left print(res, type(res))

print('************Encoding**** *********')a = ord('a') # Query the ASCII code of a certain character pair print(a, type(a))

c = chr(97) # Query the corresponding character (ASCII) according to the encoding print(c)c = 'h'print(chr(ord(c) 1))print('Given 2 lowercase letters, a

END

Notes

The seventh step is to introduce the random module, otherwise an error will be reported.

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