code: def imports_on_separate_lines(logical_line):
      r
      line = logical_line
      if line.startswith('import '):
          found = line.find(',')
          if -1 < found and ';' not in line[:found]:
              yield found, "E401 multiple imports on one line"
docs: r"""Place imports on separate lines.
  
      Okay: import os\nimport sys
      E401: import sys, os
  
      Okay: from subprocess import Popen, PIPE
      Okay: from myclas import MyClass
      Okay: from foo.bar.yourclass import YourClass
      Okay: import myclass
      Okay: import foo.bar.yourclass