| |
|---|
| | v = values[k] |
|---|
| | f.write("%s=%s\n" % (k, v)) |
|---|
| | f.write("\n") |
|---|
| | |
|---|
| | @unimplemented |
|---|
| | @untested |
|---|
| | def remove(self, key): |
|---|
| | """Remove reference to this key in the file, and remove from in memory store""" |
|---|
| | if self.filename != None: |
|---|
| | pass #TODO |
|---|
| | """Remove reference to this key in the file""" |
|---|
| | if self.filename == None: |
|---|
| | return # No file, nothing to do |
|---|
| | |
|---|
| | ####HERE#### |
|---|
| | |
|---|
| | # open file for read write |
|---|
| | # search line at a time, process each command |
|---|
| | # when we find the command 'ADD key' |
|---|
| | # reseek to start of line |
|---|
| | # write overwrite ADD with IGN |
|---|
| | # keep going in case of duplicates |
|---|
| | # close file |
|---|
| | with open(self.filename, 'r+') as f: # read and write mode |
|---|
| | while True: |
|---|
| | start = f.tell() # start of current line |
|---|
| | line = f.readline() |
|---|
| | end = f.tell() # position just beyond end of line |
|---|
| | if line == "": break # EOF |
|---|
| | # don't worry about cmd/data, space in search string disambiguates |
|---|
| | if line.startswith("ADD "): # space after is critical to simplify parser |
|---|
| | line = line.strip() # remove nl |
|---|
| | cmd, this_key = line.split(" ", 1) |
|---|
| | if this_key == key: |
|---|
| | print("found: %s %s" % (cmd, this_key)) |
|---|
| | f.seek(start) # back to start of line |
|---|
| | f.write('IGN') # patch it to be an ignore record but leave record intact |
|---|
| | f.seek(end) # back to end of line, to process next lines |
|---|
| | print("Patched to IGN rec") |
|---|
| | |
|---|
| | def write(self, filename=None): |
|---|
| | """Rewrite the whole in memory cache over the top of the external file""" |
|---|
| | #or create a new file if one does not exist |
|---|
| |
|---|
| | |
David Whale
authored
on 27 May 2016