Python String format() Method
Example
Insert the price inside the placeholder, the price should be in fixed point, two-decimal format:
txt = "For only {price:.2f} dollars!"
print(txt.format(price = 49))
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print(txt.format(price = 49))
Definition and Usage
The format() method formats the specified
value(s) and insert them inside the string's placeholder.
The placeholder is defined using curly brackets: {}. Read more about the placeholders in the Placeholder section below.
The format() method returns the formatted
string.
Syntax
string.format(value1, value2...)
Parameter Values
| Parameter | Description |
|---|---|
| value1, value2... | Required. One or more values that should be formatted and inserted in
the string. The values are either a list of values separated by commas, a key=value list, or a combination of both. The values can be of any data type. |
The Placeholders
The placeholders can be identified using named indexes
{price}, numbered
indexes {0}, or even empty placeholders
{}.
Example
Using different placeholder values:
txt1 = "My
name is {fname}, I'm {age}".format(fname = "John", age = 36)
txt2 = "My name is {0}, I'm {1}".format("John",36)
txt3 = "My name is {}, I'm {}".format("John",36)
Try it Yourself »
txt2 = "My name is {0}, I'm {1}".format("John",36)
txt3 = "My name is {}, I'm {}".format("John",36)
Formatting Types
Inside the placeholders you can add a formatting type to format the result:
:<
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Left aligns the result (within the available space)
:>
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Right aligns the result (within the available space)
:^
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Center aligns the result (within the available space)
:=
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Places the sign to the left most position
:+
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Use a plus sign to indicate if the result is positive or negative
:-
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Use a minus sign for negative values only
:
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Use a space to insert an extra space before positive numbers (and a minus sign
before negative numbers)
:,
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Use a comma as a thousand separator
:_
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Use a underscore as a thousand separator
:b
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Binary format
:c
Converts the value into the corresponding unicode character
:d
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Decimal format
:e
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Scientific format, with a lower case e
:E
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Scientific format, with an upper case E
:f
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Fix point number format
:g
General format
:G
General format (using a upper case E for scientific notations)
:o
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Octal format
:x
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Hex format, lower case
:X
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Hex format, upper case
:n
Number format
:%
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Percentage format
Related Pages
Tutorial: Python Strings
Tutorial: Python Format Strings