Configparser Integers

Question

I am not sure what I am doing wrong. Previous the code was this:

volume = min(60, max(30, volume))

However after trying with configparser I keep getting a 500 error on my Twilio Server.

volume = min(configParser.get('config_searchandplay', 'volume_max'), max(configParser.get('config_searchandplay', 'volume_min'), volume)) #Max Volume Spam Protection

CONFIG.ini

[config_searchandplay]
#Volume Protection
volume_max = 90
volume_min = 10 

Answer 1

You should use:

ConfigParser.getint(section, option)

Rather then casting.

volume = min(configParser.getint('config_searchandplay', 'volume_max'), max(configParser.getint('config_searchandplay', 'volume_min'), volume)) #Max Volume Spam Protection

Answer 2

The problem of your method is that ConfigParser.get gives you a (unicode) string. So you should convert the values first to number (using int() or float() ):

vol_max = int(configParser.get('config_searchandplay', 'volume_max'))
vol_min = int(configParser.get('config_searchandplay', 'volume_min'))
volume = min(vol_max, max(vol_min, volume))

Or use the respective convenience methods: ConfigParser.getint or ConfigParser.getfloat :

vol_max = configParser.getint('config_searchandplay', 'volume_max')
vol_min = configParser.getint('config_searchandplay', 'volume_min')

---

Although min works on strings:

>>> min(u'90',u'10')
u'10'

It will not always give the answer you are looking for since it does a string comparison. The following is what you want to avoid:

>>> min(u'9',u'10')
u'10'

Therefore you need to convert the string to a number:

>>> min(int(u'9'),(u'90'))
9

Answer 3

I prefer to convert any string to a number if it is possible (Note, you need very rear a string represented number). Here is my helper function from here .

def number(a, just_try=False):
    try:
        # First, we try to convert to integer.
        # (Note, that all integer can be interpreted as float and hex number.)
        return int(a)
    except Exception:
        # The integer convertion has failed because `a` contains others than digits [0-9].
        # Next try float, because the normal form (eg: 1E3 = 1000) can be converted to hex also.
        # But if we need hex we will write 0x1E3 (= 483) starting with 0x
        try:
            return float(a)
        except Exception:
            try:
                return int(a, 16)
            except Exception:
                if just_try:
                    return a
                else:
                    raise

def number_config(config):
    ret_cfg = {}
    for sk, sv in config._sections.items():
        ret_cfg[sk] = {k:number(v, True) for k,v in sv.items()}
    return ret_cfg