pep8 cleaning in distances methods

[dcoudert]

We do pep8 cleaning in methods all_paths, shortest_path, shortest_path_length, _check_weight_function, shortest_paths, shortest_path_lengths, shortest_path_all_pairs.

[dcoudert]

New commits:

​9dd97bd

trac #26823: pep8 in distance methods

[vklein]

python remark: I think there is a bad copy-paste line 15709.

        if not self.has_vertex(u):
            raise ValueError("vertex '{}' is not in the (di)graph".format(u))
        if not self.has_vertex(u):
            raise ValueError("vertex '{}' is not in the (di)graph".format(u))

pep8 remarks:

• 1. Missing whitespace around operator:

l 15278: s=start

• 2. At least two spaces before inline comment:

l 15289: s = next(act_path_iter[-1]) # try to get the next neighbor/successor, ...

l 15553: if u == v: # to avoid a NetworkX bug

l 15714: # to avoid a NetworkX bug

• 3. Do not assign a lambda expression use a def:

l 15551, 15724, 15947, 16167, 16450, 16490, 16516: weight_function = lambda e: e[2]

l 15564, 15736, 15949, 16169, 16481: weight_function = lambda e: 1

• 4. Too many blank lines:

l 15557

• 5. Missing whitespace:

l 15984: _,pred = ...

l 16492: dist[u],pred[u] = ...

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​6c67fc0

trac #26823: reviewer's comments

[dcoudert]

I have implemented all your comments. Thank you.

[vklein]

You're welcome.

There is one remaining weight_function = lambda e: 1 in shortest_path_all_pairs line 16487.

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​2ff0fd2

trac #26823: another lambda

[dcoudert]

oups. Fixed.

[embray]

This tickets were closed as fixed after the Sage 8.5 release.