reset.py

import os, yaml
datadir = 'userdata'
key = 'money'
maxbal = 2500.0

def is_non_zero_file(fpath):
        return True if os.path.isfile(fpath) and os.path.getsize(fpath) > 0 else False

for f in os.listdir(datadir):
    if str(f).endswith('.yml'):
        filepath = os.path.join(datadir, f)
        should_correct = False
        with open(filepath, 'r') as stream:
            if not is_non_zero_file(filepath):
                continue
            userfile = yaml.load(stream)
            if key in userfile and float(userfile[key]) > maxbal:
                should_correct = True
        if should_correct:
                with open(filepath, 'w') as stream:
                        print('Corrected ' + filepath + ' with balance ' + userfile[key])
                        userfile[key] = '0.0'
                        stream.write(yaml.dump(userfile, default_flow_style=False))