10 examples of 'how to extract numbers from a string in python' in Python

12
def extractnumbers(s):
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    return tuple(map(int,re.findall("(\d+)\.(\d+)\.(\d+)",str(s))[0]))

1384
def extract_number_str(str_in):
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    """ Extract first number from a given string and convert to a float number.
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    The function works with the following formats (,25), (.25), (2), (2,5), (2.5),
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    (1,000.25), (1.000,25) and  doesn't with (1e3), (1.5-0.4j) and negative numbers.
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    Args:
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        str_in: a string ('1,20BUY')
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    Returns:
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        A float number (1.20)
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    """
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    import re
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    # deletes all char starting after the number
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    start_char = re.search('[*:!%$&?a-zA-Z]',str_in).start()
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    str_num = str_in[:start_char]
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    if re.search('\d+',str_num) is None:
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        # no number in str_num
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        return 1.0
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    elif re.search('^(\d+|\d{1,3}(,\d{3})*)(\.\d+)?$',str_num) is not None:
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        #Commas required between powers of 1,000
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        #Can't start with "."
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        #Pass: (1,000,000), (0.001)
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        #Fail: (1000000), (1,00,00,00), (.001)
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        str_num = str_num.replace(',','')
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        return float(str_num)
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    elif re.search('^(\d+|\d{1,3}(.\d{3})*)(\,\d+)?$',str_num) is not None:
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        #Dots required between powers of 1.000
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        #Can't start with ","
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        #Pass: (1.000.000), (0,001)
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        #Fail: (1000000), (1.00.00,00), (,001)
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        str_num = str_num.replace('.','')
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        return float(str_num.replace(',','.'))
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    elif re.search('^\d*\.?\d+$',str_num) is not None:
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        #No commas allowed
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        #Pass: (1000.0), (001), (.001)
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        #Fail: (1,000.0)
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        return float(str_num)
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    elif re.search('^\d*\,?\d+$',str_num) is not None:
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        #No dots allowed
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        #Pass: (1000,0), (001), (,001)
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        #Fail: (1.000,0)
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        str_num = str_num.replace(',','.')
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        return float(str_num)

156
def get_numbers(num):
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    card_and_port = str(num)
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    card_and_port = re.split('/|-',card_and_port)
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    card = card_and_port[0]
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    fromPort = card_and_port[1]
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    toPort = fromPort if len(card_and_port) <= 2 else card_and_port[2]
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    return card, fromPort, toPort

62
def _extract_number_from(t_string):
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    return int(t_string.split()[0])

29
def parse_number(string):
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    """return the parsed number if any, otherwise, the string as it"""
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    try:
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        return int(string)
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    except ValueError:
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        pass
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    try:
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        return float(string)
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    except ValueError:
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        pass
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    return string

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def get_number(s):
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    try: return int(s)
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    except: return None

7
def parse_number(text):
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    """
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    Convert parsed text into a number.
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    :param text: Parsed text, called by :py:meth:`parse.Parser.parse()`.
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    :return: Number instance (integer), created from parsed text.
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    """
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    return int(text)

20
def ParseNumber(number):
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    if number.startswith('0x'):
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        return int(number[2:], 16)
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    else:
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        return int(number)

22
def convert_numeral_to_number(text):
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    """
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    Method to convert numeral present in text to numeric digites
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    Args:
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        text (str): text string containing numerals
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    Returns:
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        text (str): text with numeral replaced with numeric
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    Examples:
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        >> convert_numeral_to_number('teesri tarikh ko')
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        >> '3 tarikh ko'
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    """
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    text = separate_digit_text(text)
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    common = set(text.split()) & set(numbers_dict.keys())
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    if common:
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        for each in list(common):
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            text = re.sub(each, str(numbers_dict[each][0]), text)
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    return text

371
def strip_number(s: str) -> Tuple[int, str]:
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    m = re.match('[0-9]*', s)
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    assert m is not None
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    return int(m.group() or 1), s[m.end():]