The difference between python2.7 and 3.7

Difference 1: Use print syntax

Python2.7 Use print syntax >>> ; print "Hello Python"

Python3.7 Print syntax usage >>> print("Hello Python")

Example: Using double quotes to trigger a SyntaxError exception in Python 3.7.0 Mechanism Prompt Did you mean print("Hello Python3.7")

##print The difference between line wrapping and no line wrapping

python 2.7 print Use "," without line breaks

## python 3.7 print Use end=""

Difference 2: raw_input() and input()

Python 2.7 raw_input() and input() both exist and can be used raw_input() receives a string input() receives a number int /flot.

Python 3.7 raw_input() does not exist. Only input() exists. The two are merged. Receive any format and return string

Difference 3: Function cmp()

python 2.7 The cmp(x,y) function is used to compare two objects. If x ##Difference four: string uppercase and lowercase letter strings

string.letters: a string containing all letters (uppercase or lowercase)

In Python 3.0, string. ascii_letters.Related recommendations: "

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