(for example, "1e500" is such a string on many platforms) then If s represents a value that is too large to store in a float To the beginning of the string, raise ValueError, and return Representation of a floating-point number, set *endptr to point If no initial segment of the string is the valid Possible and set *endptr to point to the first unconvertedĬharacter. If endptr is not NULL, convert as much of the string as Representation of a floating-point number. ValueError and return -1.0 if the string is not a valid If endptr is NULL, convert the whole string. The conversion is independent of the current locale. The set of strings accepted by Python’s float() constructor,Įxcept that s must not have leading or trailing whitespace. The set of accepted strings corresponds to double PyOS_string_to_double ( const char * s, char * * endptr, PyObject * overflow_exception ) ¶Ĭonvert a string s to a double, raising a PythonĮxception on failure. The following functions provide locale-independent string to number conversions. This case too, but the rest of str is undefined. When rv < 0, „something bad happened.” str is '\0' in Rv + 1 bytes would have been needed to succeed. Never write more than size bytes (including the trailing '\0') into str.īoth functions require that str != NULL, size > 0, format != NULLĪnd size = size, the output conversion was truncated and a buffer with The wrappers ensure that str is always '\0' upon return. Guarantee consistent behavior in corner cases, which the Standard C functions do PyOS_snprintf() and PyOS_vsnprintf() wrap the Standard C libraryįunctions snprintf() and vsnprintf(). int PyOS_vsnprintf ( char * str, size_t size, const char * format, va_list va ) ¶įormat and the variable argument list va. Output not more than size bytes to str according to the format stringįormat and the extra arguments. int PyOS_snprintf ( char * str, size_t size, const char * format. Functions for number conversion and formatted string output.
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