How to generate the string 'x000' in Python?-CodePudding

I want to run the below command in python. I need to print the '\0000'. I try different ways to print it. I got '\x00' or '\000'. How do generate the string '\000' in python? thank you so much.

gsutil cp xxxxx.csv - | tr -d '\000' | gsutil cp - xxxxx.csv

>>> remove_string='''\000'''

>>> remove_string

'\x00'


>>> remove_string='\\000'
>>> remove_string
'\\000'
>>> remove_string=r'\\000'

>>> remove_string
'\\\\000'
>>> remove_string=r'\000'
>>> remove_string
'\\000'

CodePudding user response：

A string literal is the text you type into a program that python compiles into a str object. Python treats the backslash character \ specially - it allows you to enter characters that are not on the keyboard. But sometimes you need the backslash so it can be unescaped with \\. When displaying strings, python has both repr and str versions of the string. repr gives you the literal sting version, while str gives you the real string. Its a bit confusing that "literal" is literally not the string. If you escape the string and print it, you'll see the real characters.

>>> remove_string = '\\000'
>>> remove_string
'\\000'
>>> print(remove_string)
\000

You also used raw strings. Prepending with "r" tells python to stop using the backslash as a special string in a string literal. However, if you take the repr of that string later, you'll still get the special string literal represenation. No, problem though, because the string is correct.

>>> remove_string = r'\000'
>>> remove_string
'\\000'
>>> print(remove_string)
\000