What does format in python mean?

format function

This is a string formatting method, such as str.format().

The basic syntax is to use {} and : to replace the previous %.

The following shows two main usages:

(1) For example: the statement print("{:.2f}".format(3.1415926)), its output is 3.14, as can be seen The command is to preserve two decimal points.

(2) For example: the statement "{1} {0} {1}".format("hello", "world"), its output is 'world hello world', it can be seen that the format is They set the location.

Another example: the statement print '{} *'.format(j) indicates the value of the output variable j and the multiplication sign: j*. It can be seen that when used in a loop, a multiplication equation can be output.

Another example: The statement print "{} corresponds to the position {{0}}".format("runoob"), and its output is 'runoob The corresponding position is 0'.

The following table shows the various ways str.format() formats numbers:

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