Python_ string manipulation

1 name='hu\tqihang' #\ t is the TAB key

1. Printing related

1 Print(Name.center (50,'-'))#print a total of 50 characters, not enough to fill, name in the middle2 Print(Name.ljust (50,'-'))#print a total of 50 characters, not enough for-fill, name on the left3 Print(Name.rjust (50,'-'))#print a total of 50 characters, not enough for-fill, name on the right4 Print(Name.zfill (50))#print a total of 50 characters, not enough with 0 to fill in front

2. Find the relevant

1 Print(Name.count ('a'))#数A number of occurrences2 Print(Name.find ('Qi'))#find the leftmost qi start subscript3 Print(Name.rfind ('h'))#Find the subscript of the rightmost H4 Print(Name[name.find ('Qi'):])#find handy string slices5 Print(Name.index ('Qi'))#same as find, except if STR does not report an exception in string

3. Determine the relevant

1 Print(Name.startswith ('Hu'))#determines whether a string starts with Hu2 Print(Name.endswith ('ng'))#determines whether a string ends with Ng3 Print('abcABC123'. Isalnum ())#determine if it is an English character or number4 Print('ABCABC'. Isalpha ())#determine if it is a plain English character5 Print('1234'. IsDigit ())#determines whether a string is made up of numbers only6 Print('ABC'. Islower ())#Judging if it's all lowercase7 Print('ABC'. Isupper ())#Judging whether it's all uppercase8 Print('is Title'. Istitle ())#determine if each initial letter is capitalized9 Print(' '. Isspace ())#determine if it is a spaceTen Print(' +'. Isdecimal ())#determines whether a string contains only decimal characters One Print('name'. Isidentifier ())#determine if the variable name is valid

4. Change-related

1 Print(Name.capitalize ())#capitalize the first letter2 Print('is title'. Title ())#capitalize it every first letter3 Print('Huqihang'. Lower ())#Turn uppercase into lowercase4 Print('Huqihang'. Upper ())#Turn lowercase into uppercase5 Print('Hu Qihang'. Swapcase ())#uppercase to lowercase, lowercase to uppercase6 Print(Name.expandtabs (tabsize=30))#Turn the TAB key into 30 spaces7 Print('\nhuqihang\n'. Strip ())#Remove all carriage returns.8 Print('\nhuqihang'. Lstrip ())#Remove the carriage return to the left9 Print('huqihang\n'. Rstrip ())#Remove the right carriage returnTen Print('+'. Join (['1','2','3']))#generates a new string from the elements in the sequence with the specified character connection One Print('1+2+3+4+5+6'. Split ('+'))#divide the string into a list, + as a delimiter, not in the list, Name.split () By default is a space A Print('1+2+3\n+4+5+6'. Splitlines ())#Break into lists by line breaks

5. Replace the relevant

1 P=str.maketrans ('abc','123')2  Print(Name.translate (p))                # replaces ABC in name with 123

1 print(name.replace ('h','h', 1)) # replaces the h in name with H, replacing only one

Python_ string manipulation