#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
@File       : 字符串方法.py
@Author     : lichao
@Date       : 2024/11/20 16:01
@Software   : PyCharm
"""

string_data = 'testData'

print(string_data.find('D',0,1)) # -1

print(string_data.count('a'))

print(string_data.replace('a', 'A',1)) # testDAta

string_data2 = 'a,b,c,d,e'

print(string_data2.split(',')) # ['a', 'b', 'c', 'd', 'e']

string_data3 = '  hello '

print(string_data3.strip()) # hello

string_data4 = '12313aaa'

print(string_data4.isdigit()) # false
print(string_data4.isalnum()) # True

symbol = ','
strings = ['a','b','c','d','e']
print(symbol.join(strings)) # a,b,c,d,e