标签：style blog http io ar for 2014 sp art
The argument of write has to be a string, so if we want to put other values in a file, we have to convert them to strings. The easiest way to do that is with str. An alternative is to use the format operator, %. When applied to integers, % is the modulus operator. But when the first operand is a string, % is the format operator. The first operand is the format string, and the second operand is a tuple of expressions. The result is a string that contains the values of the expressions, formatted according to the format string.
Examples:
The format sequence ‘%g’ formats the next element in the tuple as a floating-point number, and ‘%s’ formats the next item as a string. By default, the floating-point format prints six decimal places. You can specify the number of digits as part of the format sequence. For example, the sequence ‘%8.2f’ formats a floating-point number to be 8 characters long, with 2 digits after the decimal point. The result takes up eight spaces with two digits after the decimal point.
from Thinking in Python
标签：style blog http io ar for 2014 sp art
原文地址：http://www.cnblogs.com/ryansunyu/p/3988041.html
