Python ascii() Function
Python3 Built-in Functionsascii()Is a built-in function in Python used to return the ASCII representation of an object.
ascii()Returns a string, similar torepr(), but it escapes non-ASCII characters as ASCII characters. This is very useful for debugging and logging.
Term Definition： asciiIs the abbreviation for American Standard Code for Information Interchange.
Basic Syntax and Parameters
Syntax Format
ascii(object)
Parameter Description
- Parameter object：
- Type: Any object
- Description: The object whose ASCII representation is to be obtained.
Function Description
- Return value: Returns a string.
- Feature: Non-ASCII characters are escaped as
\x、\uor\Uform.
Examples
Example 1: Basic Usage
Example
# Pure ASCII string
s = "Hello"
print(ascii(s)) # Output: 'Hello'
# Contains non-ASCII characters
s = Hello
print(ascii(s)) # Output: '\xe4\xbd\xa0\xe5\xa5\xbd'
# Mixed Chinese and English characters
s = Hello Hello
print(ascii(s)) # Output: 'Hello \xe4\xbd\xa0\xe5\xa5\xbd'
# Other non-ASCII characters
s = "café"
print(ascii(s)) # Output: 'caf\xc3\xa9'
s = "Hello"
print(ascii(s)) # Output: 'Hello'
# Contains non-ASCII characters
s = Hello
print(ascii(s)) # Output: '\xe4\xbd\xa0\xe5\xa5\xbd'
# Mixed Chinese and English characters
s = Hello Hello
print(ascii(s)) # Output: 'Hello \xe4\xbd\xa0\xe5\xa5\xbd'
# Other non-ASCII characters
s = "café"
print(ascii(s)) # Output: 'caf\xc3\xa9'
Expected output:
'Hello' '\xe4\xbd\xa0\xe5\xa5\xbd' 'Hello \xe4\xbd\xa0\xe5\xa5\xbd' 'caf\xc3\xa9'
Code analysis:
- Pure ASCII characters remain unchanged.
- Non-ASCII characters are escaped.
- Chinese characters use
\xhexadecimal escaping.
Example 2: Comparison with repr()
Example
# repr vs ascii
s = Chinese
print(f"repr: {repr(s)}") # Output: repr: 'Chinese'
print(f"ascii: {ascii(s)}") # Output: ascii: '\xe4\xb8\xad\xe6\x96\x87'
# List
lst = ["Hello", Hello, "café"]
print(repr(lst)) # Output: ['Hello', 'Hello', 'café']
print(ascii(lst)) # Output: ['Hello', '\xe4\xbd\xa0\xe5\xa5\xbd', 'caf\xc3\xa9']
# Used for printing (to avoid encoding errors)
import sys
print(ascii("Test")) # Output: '\xe6\xb5\x8b\xe8\xaf\x95'
s = Chinese
print(f"repr: {repr(s)}") # Output: repr: 'Chinese'
print(f"ascii: {ascii(s)}") # Output: ascii: '\xe4\xb8\xad\xe6\x96\x87'
# List
lst = ["Hello", Hello, "café"]
print(repr(lst)) # Output: ['Hello', 'Hello', 'café']
print(ascii(lst)) # Output: ['Hello', '\xe4\xbd\xa0\xe5\xa5\xbd', 'caf\xc3\xa9']
# Used for printing (to avoid encoding errors)
import sys
print(ascii("Test")) # Output: '\xe6\xb5\x8b\xe8\xaf\x95'
Expected output:
repr: '中文' ascii: '\xe4\xb8\xad\xe6\x96\x87' ['Hello', '你好', 'café'] ['Hello', '\xe4\xbd\xa0\xe5\xa5\xbd', 'caf\xc3\xa9'] '\xe6\xb5\x8b\xe8\xaf\x95'
ascii()It is very useful when you need to display or record non-ASCII characters in a pure ASCII environment.
Other Extensions