My version GhostGame

[anickone]

All variables appear and then disappear.

Of course, but I was talking about following several lines.

My code :)

import re, os

def make_log(msg):
    print(msg)
    log.append(msg)

def search_one_chr(py_file):
    with open(py_file) as fin:
        lines=fin.readlines()
    file_show=1
    for i, line in enumerate(lines,1):
        r=rex.findall(line)
        if r:
            if file_show:
                file_show=0
                make_log('%s\nfile = "%s"' % ('*'*50, py_file))
            c=r[0]
            if c in chrs:
                chrs[c]+=1
            else:
                chrs[c]=1
            make_log('line = %s, code = "%s"' % (i, line.rstrip()))

def log_save(log, log_file):
    with open(log_file, 'w') as fout:
        fout.write('\n'.join(log))

pattern=r"^(?:\t*| *)([a-zA-Z]) = "
rex=re.compile(pattern)
path='/usr/lib/python3.5/'
path_code_source=os.path.abspath(path)
chrs={}
log=[]
for root, dirs, files in os.walk(path_code_source):
    for next_file in files:
        if next_file.endswith('.py'):
            search_one_chr(os.path.join(root,next_file))
cnt=0
for c in sorted(chrs.keys()):
    cnt+=chrs[c]
    make_log('letter %s as var used %s times' % (c,chrs[c]))
make_log('all used one letter as var %s times' % cnt)
log_save(log, 'log_file.txt')

For python dir.

Output:
letter A as var used 4 times
letter B as var used 2 times
letter H as var used 2 times
letter I as var used 2 times
letter K as var used 1 times
letter L as var used 22 times
letter M as var used 8 times
letter N as var used 1 times
letter P as var used 2 times
letter R as var used 2 times
letter S as var used 1 times
letter T as var used 11 times
letter U as var used 2 times
letter X as var used 1 times
letter a as var used 96 times
letter b as var used 43 times
letter c as var used 144 times
letter d as var used 84 times
letter e as var used 24 times
letter f as var used 172 times
letter g as var used 40 times
letter h as var used 53 times
letter i as var used 245 times
letter j as var used 71 times
letter k as var used 54 times
letter l as var used 42 times
letter m as var used 124 times
letter n as var used 176 times
letter o as var used 24 times
letter p as var used 76 times
letter q as var used 28 times
letter r as var used 67 times
letter s as var used 300 times
letter t as var used 82 times
letter u as var used 11 times
letter v as var used 66 times
letter w as var used 42 times
letter x as var used 64 times
letter y as var used 37 times
letter z as var used 10 times
all used one letter as var 2236 times

For Django dir in my pc.

Output:
letter A as var used 1 times
letter D as var used 1 times
letter L as var used 1 times
letter M as var used 1 times
letter T as var used 1 times
letter c as var used 28 times
letter d as var used 13 times
letter e as var used 1 times
letter f as var used 16 times
letter g as var used 23 times
letter h as var used 2 times
letter i as var used 15 times
letter j as var used 3 times
letter k as var used 1 times
letter m as var used 27 times
letter n as var used 5 times
letter p as var used 13 times
letter q as var used 4 times
letter r as var used 14 times
letter s as var used 48 times
letter t as var used 27 times
letter u as var used 7 times
letter v as var used 8 times
letter w as var used 1 times
letter x as var used 5 times
letter y as var used 2 times
all used one letter as var 268 times