Hướng dẫn single backslash python

Summary: in this tutorial, you’ll learn about the Python backslash character as a part of a special sequence character or to escape characters in a string.

Introduction to the Python backslash

In Python, the backslash(\) is a special character. If you use the backslash in front of another character, it changes the meaning of that character.

For example, the t is a literal character. But if you use the backslash character in front of the letter t, it’ll become the tab character (\t).

Generally, the backslash has two main purposes.

First, the backslash character is a part of special character sequences such as the tab character \t or the new line character \n.

The following example prints a string that has a newline character:

print('Hello,\n World')
Code language: PHP (php)

Output:

Hello,
World

The \n is a single character, not two. For example:

s = '\n'
print(len(s)) # 1
Code language: PHP (php)

Second, the backslash (\) escape other special characters. For example, if you have a string that has a single quote inside a single-quoted string like the following string, you need to use the backslash to escape the single quote character:

s = '"Python\'s awesome" She said'
print(s)
Code language: PHP (php)

Output:

"Python's awesome" She said
Code language: JavaScript (javascript)

Backslash in f-strings

PEP-498 specifies that an f-string cannot contain a backslash character as a part of the expression inside the curly braces {}.

The following example will result in an error:

colors = ['red','green','blue']
s = f'The RGB colors are:\n {'\n'.join(colors)}'
print(s)
Code language: PHP (php)

Error:

SyntaxError: f-string expression part cannot include a backslash
Code language: JavaScript (javascript)

To fix this, you need to join the strings in the colors list before placing them in the curly braces:

colors = ['red','green','blue']
rgb = '\n'.join(colors)
s = f"The RGB colors are:\n{rgb}"
print(s)
Code language: PHP (php)

Output:

The RGB colors are:
red
green
blue

Backslash in raw strings

Raw strings treat the backslash character (\) as a literal character. The following example treats the backslash character \ as a literal character, not a special character:

s = r'\n'
print(s)



Code language: PHP (php)

Output:

\n

Summary

• Python backslash character (\) is a special character used as a part of special sequence such as \t and \n.
• Use the Python backslash (\) to escape other special characters in a string.
• F-strings cannot contains the backslash a part of expression inside the curly braces {}.
• Raw strings treat the backslash (\) as a literal character.

Did you find this tutorial helpful ?

Summary: in this tutorial, you’ll learn about the Python backslash character as a part of a special sequence character or to escape characters in a string.

Nội dung chính

• Introduction to the Python backslash
• Backslash in f-strings
• Backslash in raw strings
• Introduction to the Python backslash
• Backslash in f-strings
• Backslash in raw strings
• Video Tutorial
• Video Summary
• How do you print a backslash in Python?
• How do you write forward slash in Python string?
• How do I print backslash?
• How do you change the backslash with a forward slash in Python?

Introduction to the Python backslash

In Python, the backslash(\) is a special character. If you use the backslash in front of another character, it changes the meaning of that character.

For example, the t is a literal character. But if you use the backslash character in front of the letter t, it’ll become the tab character (\t).

Generally, the backslash has two main purposes.

First, the backslash character is a part of special character sequences such as the tab character \t or the new line character \n.

The following example prints a string that has a newline character:

print('Hello,\n World')
Code language: PHP (php)

Output:

Hello,
World

The \n is a single character, not two. For example:

s = '\n'
print(len(s)) # 1
Code language: PHP (php)

Second, the backslash (\) escape other special characters. For example, if you have a string that has a single quote inside a single-quoted string like the following string, you need to use the backslash to escape the single quote character:

s = '"Python\'s awesome" She said'
print(s)
Code language: PHP (php)

Output:

"Python's awesome" She said
Code language: JavaScript (javascript)

Backslash in f-strings

PEP-498 specifies that an f-string cannot contain a backslash character as a part of the expression inside the curly braces {}.

The following example will result in an error:

colors = ['red','green','blue']
s = f'The RGB colors are:\n {'\n'.join(colors)}'
print(s)
Code language: PHP (php)

Error:

SyntaxError: f-string expression part cannot include a backslash



Code language: JavaScript (javascript)

To fix this, you need to join the strings in the colors list before placing them in the curly braces:

colors = ['red','green','blue']
rgb = '\n'.join(colors)
s = f"The RGB colors are:\n{rgb}"
print(s)
Code language: PHP (php)

Output:

The RGB colors are:
red
green
blue

Backslash in raw strings

Raw strings treat the backslash character (\) as a literal character. The following example treats the backslash character \ as a literal character, not a special character:

s = r'\n'
print(s)
Code language: PHP (php)

Output:

\n

Summary

• Python backslash character (\) is a special character used as a part of special sequence such as \t and \n.
• Use the Python backslash (\) to escape other special characters in a string.
• F-strings cannot contains the backslash a part of expression inside the curly braces {}.
• Raw strings treat the backslash (\) as a literal character.

Did you find this tutorial helpful ?

Summary: in this tutorial, you’ll learn about the Python backslash character as a part of a special sequence character or to escape characters in a string.

Introduction to the Python backslash

In Python, the backslash(\) is a special character. If you use the backslash in front of another character, it changes the meaning of that character.

For example, the t is a literal character. But if you use the backslash character in front of the letter t, it’ll become the tab character (\t).

Generally, the backslash has two main purposes.

First, the backslash character is a part of special character sequences such as the tab character \t or the new line character \n.

The following example prints a string that has a newline character:

print('Hello,\n World')
Code language: PHP (php)

Output:

Hello,
World

The \n is a single character, not two. For example:

s = '\n'
print(len(s)) # 1



Code language: PHP (php)

Second, the backslash (\) escape other special characters. For example, if you have a string that has a single quote inside a single-quoted string like the following string, you need to use the backslash to escape the single quote character:

s = '"Python\'s awesome" She said'
print(s)
Code language: PHP (php)

Output:

"Python's awesome" She said
Code language: JavaScript (javascript)

Backslash in f-strings

PEP-498 specifies that an f-string cannot contain a backslash character as a part of the expression inside the curly braces {}.

The following example will result in an error:

colors = ['red','green','blue']
s = f'The RGB colors are:\n {'\n'.join(colors)}'
print(s)
Code language: PHP (php)

Error:

SyntaxError: f-string expression part cannot include a backslash
Code language: JavaScript (javascript)

To fix this, you need to join the strings in the colors list before placing them in the curly braces:

colors = ['red','green','blue']
rgb = '\n'.join(colors)
s = f"The RGB colors are:\n{rgb}"
print(s)
Code language: PHP (php)

Output:

The RGB colors are:
red
green
blue

Backslash in raw strings

Raw strings treat the backslash character (\) as a literal character. The following example treats the backslash character \ as a literal character, not a special character:

s = r'\n'
print(s)
Code language: PHP (php)

Output:

\n

Summary

• Python backslash character (\) is a special character used as a part of special sequence such as \t and \n.
• Use the Python backslash (\) to escape other special characters in a string.
• F-strings cannot contains the backslash a part of expression inside the curly braces {}.
• Raw strings treat the backslash (\) as a literal character.

Did you find this tutorial helpful ?