Capturing a function call as dict Question: I’m trying to write a python function decorator, and part of my implementation is that I need to capture the function call and look through the supplied values. I already have the function signature by using inspect.signature, but I’m unsure how to compose it with passed arguments. Say …
inspect.getsourcelines(object) shows OSError if run from python shell but gives no error if run from a file Question: I tried this code-snippet inside a script named test.py : from inspect import * def f1(p,r): “””Return f1 score from p,r””” return 2*p*r/(p+r) print(getsourcelines(f1)) If I run this from terminal with python3 test.py, it outputs the following …
Get line number where variable is defined Question: I’m trying to extract the line number where a specific variable was created. This sounds like a simple question, after all, I could loop through the lines of code and try to search, or do a regular expression. But that might be a false line number and …
How to find out if (the source code of) a function contains a loop? Question: Let’s say, I have a bunch of functions a, b, c, d and e and I want to find out if they directly use a loop: def a(): for i in range(3): print(i**2) def b(): i = 0 while i …
get current function name inside that function using python Question: For my logging purpose i want to log all the names of functions where my code is going Does not matter who is calling the function , i want the the function name in which i declare this line import inspect def whoami(): return inspect.stack()[1][3] …
Debugging: Get filename and line number from which a function is called? Question: I’m currently building quite a complex system in Python, and when I’m debugging I often put simple print statements in several scripts. To keep an overview I often also want to print out the file name and line number where the print …
What is the difference between a stack and a frame? Question: Under what situations would I want to use one over the other? What is the difference between: >>> import inspect >>> print(inspect.getouterframes(inspect.currentframe())) [(<frame object at 0x8fc262c>, ‘<stdin>’, 1, ‘<module>’, None, None)] And: >>> import traceback >>> traceback.extract_stack() [(‘<stdin>’, 1, ‘<module>’, None)] Update: Another: >>> …
Python inspect.stack is slow Question: I was just profiling my Python program to see why it seemed to be rather slow. I discovered that the majority of its running time was spent in the inspect.stack() method (for outputting debug messages with modules and line numbers), at 0.005 seconds per call. This seems rather high; is …
Get full package module name Question: For verbose debug messages in my application I’m using a function that returns a helpful prefix. Consider the following example: import inspect def get_verbose_prefix(): “””Returns an informative prefix for verbose debug output messages””” s = inspect.stack() module_name = inspect.getmodulename(s[1][1]) func_name = s[1][3] return ‘%s->%s’ % (module_name, func_name) def awesome_function_name(): …
Using a dictionary to select function to execute Question: I am trying to use functional programming to create a dictionary containing a key and a function to execute: myDict={} myItems=(“P1″,”P2″,”P3″,….”Pn”) def myMain(key): def ExecP1(): pass def ExecP2(): pass def ExecP3(): pass … def ExecPn(): pass Now, I have seen a code used to find the …
