Compare 2 python codes automatically

Question

Okay, so I currently am working on a large python 2.7 codebase where my current task is as follows:

There are 2 modules say A and B which have a lot of similar code (I mean almost all methods are identical). My goal is to create a Base module to contain all the common code.

For this purpose I currently am manually reading and comparing functions (of the same name) between A and B to see if they are same (or even almot same)or not.

So is there a some way to automate this? Like a library like diff which is built to compare 2 python function codes to tell me if their content is same/almost same or not?

So for example currently I am working on 2 modules ResourceStatusDB.py and ResourceStatusManagement.py:

ResourceStatusDB.py

class ResourceManagementDB(BaseRSSDB):
.
.
.
def select(self, table, params):

    session = self.sessionMaker_o()
    XYZ()
    # finding the table
    found = False
    for ext in self.extensions:
      try:
        table_c = getattr(__import__(ext + __name__, globals(), locals(), [table]), table)
        found = True
        break
      except (ImportError, AttributeError):
        continue
    # If not found in extensions, import it from DIRAC base (this same module).
    if not found:
      table_c = getattr(__import__(__name__, globals(), locals(), [table]), table)

And ResourceStatusManagement.py def select(self, table, params):

session = self.sessionMaker_o()
# finding the table
found = False
for ext in self.extensions:
  try:
    table_c = getattr(__import__(ext + __name__, globals(), locals(), [table]), table)
    found = True
    break
  except (ImportError, AttributeError):
    continue
# If not found in extensions, import it from DIRAC base (this same module).
if not found:
  table_c = getattr(__import__(__name__, globals(), locals(), [table]), table)

Notice that the 2 functions are not exactly the same. (A difference of a few lines maybe possible). But still a majority of the logic is same at the function level. Any way to detect this?

most advanced text editors have a "compare" function, look at Notepad++ for instance — David Zemens, Jun 15 '19 at 15:10
or load A into a git repo and then update it with B code and diff using git, etc. THere's many ways to skin this cat. — David Zemens, Jun 15 '19 at 15:10
Possible duplicate of https://stackoverflow.com/questions/20059011/check-if-two-python-functions-are-equal — ParthS007, Jun 15 '19 at 15:10
@ParthS007 its not a duplicate. I do not want to check if they are exactly equal or not. — 97amarnathk, Jun 15 '19 at 15:19
@heemayl I want to compare 2 functions and not the entire files. Also I know that I can do it with some programming + diff. I was just curious if there was some tool already available. — 97amarnathk, Jun 15 '19 at 15:20

score 2 · Accepted Answer · answered Jun 15 '19 at 15:37

2

Question is not python-related in my opinion ;P

Notepad++ has compare if u install addons You can use winmerge, for file comparison

Total commander also in syncing folder has defualt tool to compare and modify.

Go with winmerge, best in my opinion.

answered Jun 15 '19 at 15:37

Grzegorz Krug

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Compare 2 python codes automatically

1 Answers1