Related methods for "Python string" string (ii)

Finds the first index position of an element text.find () can have a start and end position find (' ex ', 3,6)

# find the index position of an element ' Alexalex '  = text.find ('ex')print(ret)

2

A format operation that replaces a placeholder in a string with a specified value

# A format operation that replaces a placeholder in a string with a specified value ' My name is: {name}, my age is: {ages} ' ret=text.format (name='Alex', age=15)print(ret)

My name is: Alex, my age is: 15

Equivalent: Text.format_map ({' name ': ' Alet ', ' age ': 19})

Determines whether a string contains only numbers and letters Isalnum ()

# determine if a string contains only numbers and letters
test1='abc123'test2='abc123+-*'ret1= test1.isalnum () ret2=test2.isalnum ()print(Ret1,ret2)

True False

　　

Related methods for "Python string" string (ii)