This question already has answers here:
What exactly do "u" and "r" string prefixes do, and what are raw string literals?
(7 answers)
How can I put an actual backslash in a string literal (not use it for an escape sequence)?
(4 answers)
Closed 6 years ago.
What is the equivalent of
string c# = #"\hello"
in python?
python = '\hello'
In other words, how would I bypass the '\'' breakpoint in python?
Assuming you mean that you want \ to not act like an escape character, then you simply escape \ with another \:
myString = "\\hello"
print myString
This prints:
\hello
You also can use a "raw" string:
myString = r"\hello"
"I am 6'2\" tall." # escape double-quote inside string
'I am 6\'2"
tall.' # escape single-quote inside string
A general rule of thumb in any programming language to print the escape character or use it as a part of string is to escape the escape character.
So
>>print "\\hello"
\hello
Also as pointed by #IanPudney , python provides a special mechanism to print the raw string. Just use print r"\hello"
I hope this helps
Related
This question already has answers here:
What exactly is a "raw string regex" and how can you use it?
(7 answers)
Closed 7 months ago.
I had thought the 'r' prefix in the pattern is to make sure that anything in the pattern will be interpreted as string literal, so that I don't have to use escape, but in this case below, I still have to use '.' for literal match. So what's the purpose of the 'r' in the beginning of the regex?
pattern = r'.'
text = "this is. test"
text = re.sub(pattern, ' ', text)
The r prefix stands for "raw." It means that escape sequences inside a raw string will appear as literal. Consider:
print('Hello\b World') # Hello World
print(r'Hello\b World') # Hello\b World
In the first non raw string example, \b is interpreted as a control character (which doesn't get printed). In the second example using a raw string, \b is a literal word boundary.
Another example would be comparing '\1' to r'\1'. In the former, '\1' is a control character, while the latter is the first capture group. Note that to represent the first capture group without using a raw string we can double up backslashes, i.e. use '\\1'.
This question already has answers here:
How can I put an actual backslash in a string literal (not use it for an escape sequence)?
(4 answers)
Closed 3 years ago.
So I'm trying to write this exact string but I don't \n to make a new line I want to actually print \n on the screen. Any thoughts on how to go about this? (using python
Languages:\npython\nc\njava
adding a backslash will interpret the succeeding backslash character literally. print("\\n").
Either escape the backslash by preceding it with another backslash:
'Languages:\\npython\\nc\\njava'
Or use a raw string by preceding the literal with an r:
r'Languages:\npython\nc\njava'
This question already has an answer here:
Different way to specify matching new line in Python regex
(1 answer)
Closed 4 years ago.
Suppose I have a string s = hi\nhellon\whatsup and I want to split it.
If I use s.split('\n'), I get the expected output:
['hi', 'hello', 'whatsup']
However, if I use re.split('\n', s), it is actually `re.split(r'\n', s) and I also get the same output:
['hi', 'hello', 'whatsup']
Why does splitting on a raw string literal with re.split() work?
What is this black magic?
\n is both the ASCII escape for newlines and the regex escape meaning "match a newline". So in a raw string, used with re.split, it looks for it as the regex escape; in a non-raw string, it looks for the literal ASCII character, but either way it finds the newline to split on.
This question already has answers here:
Why can't Python's raw string literals end with a single backslash?
(13 answers)
Closed 5 years ago.
As we all know,we can create a string like this:
str1 = r"\abc\test"
But if I want put the \ in the end of a string like:
str2 = r"\abc\test\"
A syntax error occurs !
I have found an answer,but it's in JavaScript.
`String.raw` when last character is `\`
So,How to deal this in python
You can concat another normal string:
>>> r'\abc\test' + '\\'
'\\abc\\test\\'
duplicated Why can't Python's raw string literals end with a single backslash?
https://docs.python.org/3/reference/lexical_analysis.html
Specifically, a raw literal cannot end in a single backslash (since the backslash would escape the following quote character). Note also that a single backslash followed by a newline is interpreted as those two characters as part of the literal, not as a line continuation.
This question already has answers here:
Why do backslashes appear twice?
(2 answers)
Closed 7 years ago.
Pretty much as question states- I have a code that finds sentences in a big string using regex- findall(). It then uses this sentence later, however when it uses it it puts a backslash infront of any apostrophe, for example Today's becomes Today\'s. Why is this happening, and how can I stop this happening?
It's called escaping a string. When you use " or ' inside of a string use \ to avoid lexical syntax errors. I believe there is a method that removes the escape character from a string if that's what you'd like to do.
The backslash denotes a so called escape sequence, which basically tells python that this character has to be interpreted differently from a "normal" ' character (which would signal the beginning or end of a string for the interpreter).