| object freq): |
| cdef: |
| object ret |
| int year, quarter = -1, month, mnum, date_len |
|
| # special handling for possibilities eg, 2Q2005, 2Q05, 2005Q1, 05Q1 |
| assert isinstance(date_string, (str, unicode)) |
|
| # len(date_string) == 0 |
| # should be NaT??? |
|
| if date_string in nat_strings: |
| return NaT, NaT, '' |
|
| date_string = date_string.upper() |
| date_len = len(date_string) |
|
| if date_len == 4: |
| # parse year only like 2000 |
| try: |
| ret = default.replace(year=int(date_string)) |
| return ret, ret, 'year' |
| except ValueError: |
| pass |
|
| try: |
| if 4 <= date_len <= 7: |
| i = date_string.index('Q', 1, 6) |
| if i == 1: |
| quarter = int(date_string[0]) |
| if date_len == 4 or (date_len == 5 |
| and date_string[i + 1] == '-'): |
| # r'(\d)Q-?(\d\d)') |
| year = 2000 + int(date_string[-2:]) |
| elif date_len == 6 or (date_len == 7 |
| and date_string[i + 1] == '-'): |
| # r'(\d)Q-?(\d\d\d\d)') |
| year = int(date_string[-4:]) |
| else: |
| raise ValueError |
| elif i == 2 or i == 3: |
| # r'(\d\d)-?Q(\d)' |
| if date_len == 4 or (date_len == 5 |
| and date_string[i - 1] == '-'): |
| quarter = int(date_string[-1]) |
| year = 2000 + int(date_string[:2]) |
| else: |
| raise ValueError |
| elif i == 4 or i == 5: |
| if date_len == 6 or (date_len == 7 |
| and date_string[i - 1] == '-'): |
| # r'(\d\d\d\d)-?Q(\d)' |
| quarter = int(date_string[-1]) |
| year = int(date_string[:4]) |
| else: |
| raise ValueError |
|
| if not (1 <= quarter <= 4): |
| msg = ('Incorrect quarterly string is given, quarter must be ' |
| 'between 1 and 4: {dstr}') |
| raise DateParseError(msg.format(dstr=date_string)) |
|
| if freq is not None: |
| # hack attack, #1228 |
| try: |
| mnum = MONTH_NUMBERS[_get_rule_month(freq)] + 1 |
| except (KeyError, ValueError): |
| msg = ('Unable to retrieve month information from given ' |
| 'freq: {freq}'.format(freq=freq)) |
| raise DateParseError(msg) |
|
| month = (mnum + (quarter - 1) * 3) % 12 + 1 |
| if month > mnum: |
| year -= 1 |
| else: |
| month = (quarter - 1) * 3 + 1 |
|
| ret = default.replace(year=year, month=month) |
| return ret, ret, 'quarter' |
|
| except DateParseError: |
| raise |
| except ValueError: |
| pass |
|
| if date_len == 6 and (freq == 'M' or |
| getattr(freq, 'rule_code', None) == 'M'): |
| year = int(date_string[:4]) |
| month = int(date_string[4:6]) |
| try: |
| ret = default.replace(year=year, month=month) |
| return ret, ret, 'month' |
| except ValueError: |
| pass |
|
| for pat in ['%Y-%m', '%m-%Y', '%b %Y', '%b-%Y']: |
| try: |
| ret = datetime.strptime(date_string, pat) |
| return ret, ret, 'month' |
| except ValueError: |
| pass |
|
| raise ValueError('Unable to parse {0}'.format(date_string)) |