Statsclass removes all leading path information from file names. It is very useful in reducing the size of the printout to fit within (close to) 80 columns. This method modifies the object, and the stripped information is lost. After performing a strip operation, the object is considered to have its entries in a ``random'' order, as it was just after object initialization and loading. If
strip_dirs()causes two function names to be indistinguishable (i.e., they are on the same line of the same filename, and have the same function name), then the statistics for these two entries are accumulated into a single entry.
Statsclass accumulates additional profiling information into the current profiling object. Its arguments should refer to filenames created by the corresponding version of
profile.run(). Statistics for identically named (re: file, line, name) functions are automatically accumulated into single function statistics.
Statsobject by sorting it according to the supplied criteria. The argument is typically a string identifying the basis of a sort (example:
When more than one key is provided, then additional keys are used as secondary criteria when the there is equality in all keys selected before them. For example, sort_stats('name', 'file') will sort all the entries according to their function name, and resolve all ties (identical function names) by sorting by file name.
Abbreviations can be used for any key names, as long as the abbreviation is unambiguous. The following are the keys currently defined:
Note that all sorts on statistics are in descending order (placing
most time consuming items first), where as name, file, and line number
searches are in ascending order (i.e., alphabetical). The subtle
"stdname" is that the
standard name is a sort of the name as printed, which means that the
embedded line numbers get compared in an odd way. For example, lines
3, 20, and 40 would (if the file names were the same) appear in the
string order 20, 3 and 40. In contrast,
"nfl" does a numeric
compare of the line numbers. In fact,
sort_stats("nfl") is the
sort_stats("name", "file", "line").
For compatibility with the old profiler, the numeric arguments
`-1', `0', `1', and `2' are permitted. They are
"cumulative" respectively. If this old style format (numeric)
is used, only one sort key (the numeric key) will be used, and
additional arguments will be silently ignored.
Statsclass reverses the ordering of the basic list within the object. This method is provided primarily for compatibility with the old profiler. Its utility is questionable now that ascending vs descending order is properly selected based on the sort key of choice.
Statsclass prints out a report as described in the
The order of the printing is based on the last
operation done on the object (subject to caveats in
The arguments provided (if any) can be used to limit the list down to the significant entries. Initially, the list is taken to be the complete set of profiled functions. Each restriction is either an integer (to select a count of lines), or a decimal fraction between 0.0 and 1.0 inclusive (to select a percentage of lines), or a regular expression (to pattern match the standard name that is printed). If several restrictions are provided, then they are applied sequentially. For example:
would first limit the printing to first 10% of list, and then only print functions that were part of filename `.*foo:'. In contrast, the command:
would limit the list to all functions having file names `.*foo:', and then proceed to only print the first 10% of them.
Statsclass prints a list of all functions that called each function in the profiled database. The ordering is identical to that provided by
print_stats(), and the definition of the restricting argument is also identical. For convenience, a number is shown in parentheses after each caller to show how many times this specific call was made. A second non-parenthesized number is the cumulative time spent in the function at the right.
Statsclass prints a list of all function that were called by the indicated function. Aside from this reversal of direction of calls (re: called vs was called by), the arguments and ordering are identical to the
Statsclass is used to dispose of the value returned by earlier methods. All standard methods in this class return the instance that is being processed, so that the commands can be strung together. For example:
pstats.Stats('foofile').strip_dirs().sort_stats('cum') \ .print_stats().ignore()
would perform all the indicated functions, but it would not return
the final reference to the