Python json 模块，py() 实例源码

def add(conf, var, val):
    if var not in conf:
        conf[var] = val
        return

    if isinstance(val, dict) and isinstance(conf[var], dict):
        conf[var].update(val)
        return

    if not isinstance(conf[var], list):
        conf[var] = [conf[var]]
    if isinstance(val, list):
        conf[var] += val
    else:
        conf[var].append(val)

# Scan to end of JSON object.  Grrr, why can't json.py do this without
# reading all of fp?

def add(conf, var, val):
    if var not in conf:
        conf[var] = val
        return

    if isinstance(val, dict) and isinstance(conf[var], dict):
        conf[var].update(val)
        return

    if not isinstance(conf[var], list):
        conf[var] = [conf[var]]
    if isinstance(val, list):
        conf[var] += val
    else:
        conf[var].append(val)

# Scan to end of JSON object.  Grrr, why can't json.py do this without
# reading all of fp?

def main():
    global logger
    logger = logging.getLogger('compare-viewer-json')

    if (len(sys.argv) != 3):
        sys.stderr.write("**** ERROR: Wrong number of arguments.\n") 
        sys.stderr.write("Usage: compare-viewer-json.py <file1> <file2> \n")
        sys.exit(1)

    # Read the 1st file and create a DNA structure object from it.
    file_name1 = sys.argv[1]
    dna_structure1 = DnaStructure(file_name1)
    dna_structure1.read_json(file_name1)
    logger.info("")

    # Read the 2nd file and create a DNA structure object from it.
    file_name2 = sys.argv[2]
    dna_structure2 = DnaStructure(file_name2)
    dna_structure2.read_json(file_name2)

    # Compare the data.
    if not dna_structure1.compare(dna_structure2):
        sys.exit(1)

def json_text():
    """Returns the parser for Json formatted data"""
    # Taken from https://github.com/vlasovskikh/funcparserlib/blob/master/funcparserlib/tests/json.py
    # and modified slightly
    unwrap = lambda x: x.value

    null = (n('null') | n('Null')) >> const(None) >> unwrap

    value = forward_decl()
    member = (string >> unwrap) + op_(u':') + value >> tuple
    object = (
        op_(u'{') +
        maybe(member + many(op_(u',') + member) + maybe(op_(','))) +
        op_(u'}')
        >> make_object)
    array = (
        op_(u'[') +
        maybe(value + many(op_(u',') + value) + maybe(op_(','))) +
        op_(u']')
        >> make_array)

    value.define(
        null
        | (true >> unwrap)
        | (false >> unwrap)
        | object
        | array
        | (number >> unwrap)
        | (string >> unwrap))
    json_text = object | array

    return json_text

def showInfo():
  print "CSV to JSON Converter"
  print "USAGE: csv-to-json.py <CSVFILE>"
  print ""
  print "Use I/O redirection for creating resulting files. Example:"
  print "python ./csv-to-json.py sample.csv > sample.json"

def get_lexer(mime, explicit_json=False, body=''):

    # Build candidate mime type and lexer names.
    mime_types, lexer_names = [mime], []
    type_, subtype = mime.split('/', 1)
    if '+' not in subtype:
        lexer_names.append(subtype)
    else:
        subtype_name, subtype_suffix = subtype.split('+', 1)
        lexer_names.extend([subtype_name, subtype_suffix])
        mime_types.extend([
            '%s/%s' % (type_, subtype_name),
            '%s/%s' % (type_, subtype_suffix)
        ])

    # As a last resort, if no lexer feels responsible, and
    # the subtype contains 'json', take the JSON lexer
    if 'json' in subtype:
        lexer_names.append('json')

    # Try to resolve the right lexer.
    lexer = None
    for mime_type in mime_types:
        try:
            lexer = pygments.lexers.get_lexer_for_mimetype(mime_type)
            break
        except ClassNotFound:
            pass
    else:
        for name in lexer_names:
            try:
                lexer = pygments.lexers.get_lexer_by_name(name)
            except ClassNotFound:
                pass

    if explicit_json and body and (not lexer or isinstance(lexer, TextLexer)):
        # JSON response with an incorrect Content-Type?
        try:
            json.loads(body)  # FIXME: the body also gets parsed in json.py
        except ValueError:
            pass  # Nope
        else:
            lexer = pygments.lexers.get_lexer_by_name('json')

    return lexer