How to pad a string with leading zeros in Python 3

How to pad a string with leading zeros in Python 3

You can pad a string with leading zeros in Python 3 using the .zfill() method or string formatting. Here's how you can do it using both methods:

  1. Using .zfill() method:

    The .zfill() method is a convenient way to pad a string with leading zeros. You provide the desired width, and the method adds zeros to the left of the string to meet that width.

    original_string = "42" padded_string = original_string.zfill(5) # Pad with zeros to a width of 5 print(padded_string) # Output: "00042"

  2. Using string formatting:

    You can also achieve the same result using string formatting with the str.format() method or using f-strings (formatted string literals).

    Using str.format():

    original_string = "42" padded_string = "{:05}".format(original_string) # Pad with zeros to a width of 5 print(padded_string) # Output: "00042"

    Using f-strings:

    original_string = "42" padded_string = f"{original_string:05}" # Pad with zeros to a width of 5 print(padded_string) # Output: "00042"

In all of the above examples, the padding is done by specifying the desired width (in this case, 5) and using leading zeros as the padding character. Replace original_string with the string you want to pad, and adjust the width as needed.

Examples

  1. "Python 3 pad string with leading zeros"

    • Description: To pad a string with leading zeros in Python 3, you can use string formatting with the str.format() method.
    original_string = "123" padded_string = "{:0>5}".format(original_string) # Output: "00123"

  2. "How to add leading zeros to a string in Python 3"

    • Description: Using the zfill() method is another way to add leading zeros to a string in Python 3.
    original_string = "456" padded_string = original_string.zfill(8) # Output: "00000456"

  3. "Python 3 pad string with leading zeros dynamically"

    • Description: To dynamically pad a string with leading zeros in Python 3, you can calculate the required padding length and then use string formatting.
    original_string = "789" desired_length = 8 padded_string = "{:0>{}}".format(original_string, desired_length) # Output: "00000789"

  4. "How to add leading zeros to a number string in Python 3"

    • Description: String formatting with the str.format() method allows you to add leading zeros to a number string in Python 3.
    original_string = "2468" padded_string = "{:0>10}".format(original_string) # Output: "0000002468"

  5. "Python 3 pad string with leading zeros to fixed length"

    • Description: To pad a string with leading zeros to a fixed length in Python 3, you can use string formatting or the zfill() method.
    original_string = "1357" padded_string = original_string.zfill(8) # Output: "00001357"

  6. "How to add leading zeros to a string representing a number in Python 3"

    • Description: Using string formatting with the str.format() method is an effective way to add leading zeros to a string representing a number in Python 3.
    original_string = "159" padded_string = "{:0>6}".format(original_string) # Output: "000159"

  7. "Python 3 pad string with leading zeros to reach fixed length"

    • Description: The zfill() method can be used to pad a string with leading zeros to reach a fixed length in Python 3.
    original_string = "258" padded_string = original_string.zfill(7) # Output: "0000258"

  8. "How to pad a string with leading zeros to a specific length in Python 3"

    • Description: String formatting with the str.format() method allows you to pad a string with leading zeros to a specific length in Python 3.
    original_string = "369" desired_length = 9 padded_string = "{:0>{}}".format(original_string, desired_length) # Output: "000000369"

  9. "Python 3 pad string with leading zeros using format()"

    • Description: The format() function can be used to pad a string with leading zeros in Python 3 by specifying format specifiers.
    original_string = "369" padded_string = format(original_string, '0>9') # Output: "000000369"

  10. "How to add leading zeros to a string with format() in Python 3"

    • Description: The format() function allows you to add leading zeros to a string by specifying the desired width and padding character.
    original_string = "123" padded_string = format(original_string, '>08') # Output: "00000123"

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