(f, size)
| 56 | # read @size bytes from @f & return data. |
| 57 | # return None when there is not enough data |
| 58 | def get_code(f, size): |
| 59 | code = f.read(size) |
| 60 | if len(code) != size: # reached end-of-file? |
| 61 | # then reset file position to begin-of-file |
| 62 | f.seek(0) |
| 63 | return None |
| 64 | |
| 65 | return code |
| 66 | |
| 67 | |
| 68 | def cs(md, code): |