![]() Print("old_format:", "%s %s %s %s %s" % s) Formatting numbers in Python is necessary to display numbers in a specific format. Examples of Python format () Function Let’s see Python format () Function through some examples: Example 1 Code: x format(0. And python-format () function represents the form in which value has to be presented. "some debug info: roflcopters are active", then that string will be passed to log.debug(). format( value,format) Here value refers to one, which needs to be represented. ![]() And Python, not being a lazy language, evaluates expressions before calling functions, so the expression log.debug("some debug info: %s" % some_info) will first evaluate the string to, e.g. To answer your second question, string formatting happens at the same time as any other operation - when the string formatting expression is evaluated. Only use it for backwards compatibility with Python 2.5. Also in the second example you gave, the. Which is just ugly.format doesn't have those issues. To guarantee that it always prints, you'd need to do "Hello %s" % (name,) # supply the single argument as a single-item tuple If format specifier is a Unicode object, or if any of the objects being converted using the s conversion are Unicode objects, the result will also be a Unicode object. The interpretation of formatspec will depend on the type of the value argument however, there is a standard formatting syntax that is used by most built-in types: Format Specification Mini-Language. Yet, if name happens to be (1, 2, 3), it will throw a TypeError. format (value, formatspec '') Convert a value to a formatted representation, as controlled by formatspec. You'd think the following would always work: "Hello %s" % name ![]() debug () method rather than doing the formatting yourself: log.debug ('some debug info: s', someinfo) which avoids doing the formatting unless the logger actually logs something. An annoying thing about % is also how it can either take a variable or a tuple. Assuming you're using Python's logging module, you can pass the string formatting arguments as arguments to the. To answer your first question.format just seems more sophisticated in many ways. The format () method returns a formatted representation of the given value controlled by the format specifier. ![]()
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