Python判断包含

string1 = "hello world"
string2 = "world"

if string2 in string1:
    print("string1包含string2")
else:
    print("string1不包含string2")

string1包含string2

string1 = "hello world"
string2 = "world"

if string1.find(string2) != -1:
    print("string1包含string2")
else:
    print("string1不包含string2")

string1包含string2

import re

string1 = "hello world"
string2 = "world"

pattern = re.compile(string2)
if pattern.search(string1):
    print("string1包含string2")
else:
    print("string1不包含string2")

string1包含string2

string1 = "hello world"
string2 = "hello"

if string1.startswith(string2):
    print("string1以string2开头")

if string1.endswith(string2):
    print("string1以string2结尾")

string1以string2开头

string1 = "hello world hello"
string2 = "hello"

count = string1.count(string2)
print(f"string1中包含{string2}的次数为：{count}")

string1中包含hello的次数为：2