A brief introduction to the use of any() and all() in Python

This article brings you a brief introduction to the use of any() and all() in Python. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Introduction

In ordinary text processing work, I often encounter such a situation: use python to determine whether a string contains a elements in the list.

It will be very concise to use python’s built-in function any() at this time:

fruits = ['apple', 'orange', 'peach']
str = "I want some apples"
if any(element in str for element in fruits):    
print "string contains some fruits."

any()

In fact The any function is very simple: determine whether a tuple or list is all empty, 0, False. If it is all empty, 0, False, it returns False; if it is not all empty, it returns True.

all()

all function is just the opposite of any: determine whether a tuple or list is complete Is not empty, 0, False. If none are empty, returns True; otherwise returns False.

It should be noted here that the return value of empty tuple and empty list is True

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