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Python - Strings encode() method

Last Updated : 11 Jul, 2025

String encode() method in Python is used to convert a string into bytes using a specified encoding format. This method is beneficial when working with data that needs to be stored or transmitted in a specific encoding format, such as UTF-8, ASCII, or others.

Let's start with a simple example to understand how the encode() method works:

s = "Hello, World!"

encoded_text = s.encode()
print(encoded_text) 

• The string "Hello, World!" is encoded into bytes using the default UTF-8 encoding.
• The result, b'Hello, World!', is a bytes object prefixed with b.

string.encode(encoding="utf-8", errors="strict")

• encoding (optional):
  • The encoding format to use. The default is "utf-8".
  • Examples include "ascii", "latin-1", "utf-16", etc.
• errors (optional):
  • Specifies the error handling scheme. Possible values are:
    • "strict" (default): Raises a UnicodeEncodeError for encoding errors.
    • "ignore": Ignores errors and skips invalid characters.
    • "replace": Replaces invalid characters with a replacement character (? in most encodings).
    • "xmlcharrefreplace": Replaces invalid characters with their XML character references.
    • "backslashreplace": Replaces invalid characters with a Python backslash escape sequence.

• Returns a bytes object containing the encoded version of the string.

We can encode a string by using utf-8 .here’s what happens when we use UTF-8 encoding:

a = "Python is fun!"
utf8_encoded = a.encode("utf-8")
print(utf8_encoded) 

• The encode("utf-8") method converts the string into a bytes object.
• Since UTF-8 supports all characters in the input, the encoding succeeds without errors.

ASCII encoding only supports characters in the range 0-127. Let’s see what happens when we try to encode unsupported characters:

a = "Pythön"
encoded_ascii = a.encode("ascii", errors="replace")
print(encoded_ascii) 

• The string "Pythön" contains the character ö ("ö"), which is not supported by ASCII.
• The errors="replace" parameter replaces the unsupported character with a ?.

This example demonstrates how to replace unsupported characters with their XML character references:

a = "Pythön"

encoded_xml = a.encode("ascii", errors="xmlcharrefreplace")
print(encoded_xml) 

• The character ö ("ö") is replaced with its XML character reference ö.
• This approach is useful when generating XML or HTML content.

Here’s how the backslash replace error handling scheme works:

a = "Pythön"

encoded_backslash = a.encode("ascii", errors="backslashreplace")
print(encoded_backslash)  

• The unsupported character ö ("ö") is replaced with the backslash escape sequence \xf6.
• This representation preserves the original character’s byte value.

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