Datentypen
- List: ['a', 1]; x[1] = 5
- Tupel: ('a', 1), ro
Spezielle Methoden/Attribute
class X:
@staticmethod
def doIt(param):
pass
X.doIt(True)
- Feststellen, ob Attribut existiert: hasattr(instance, nameOfAttribute)
Dictionary
x = { 'key' : 'val', 'xyz': 3 }
x['key'] = value
del x['key'];
contains = 'key' in x and 'key2' not in x
size = len(x)
for pair in x.iteritems():
key = pair[0]
for key in x.iterkeys():
print key
- x.itervalues()
- x.setdefault(key[, value]): setzt Wert nur, wenn noch nicht gesetzt
- x.keys(), x.values()
- x.copy(): flache Kopie
- x.update(dict): addiert dict zu x
Mengen
s = set(['y', 3]) ; f = frozenset(['y', 3])
for elem in s:
print elem
size = len(s)
contains = 3 in s and 4 not in s
intersection = s & f
union = s | f
isPartOf = s <= f
diff = s - f
Dateien
with open(self._filename, "r") as fp:
for line in fp:
print line
fp.close()
Typcheck
isStringOrSubclass = isinstance(aVariable, str)
isString = type(aVariable) is str
Formatierung
"{:3.7f} {:s} {:07d}".format(3.14, "hello", 100)
"{0:d} / {0:x}".format(714)