say you have a class that looks like this
class class_name():
def __init__(self,var1, var2, var3, var4, var5):
self.var1 = var1
self.var2 = var2
self.var3 = var3
self.var4 = var4
self.var5 = var5
this can get very long.
I have already tried to use a for loop and an exec statement but that did not work.
is there a shorter way to assign all of the variables to the class?
That looks like a dataclass.
Assuming your vars are strings you can define a dataclass like this:
from dataclasses import dataclass
@dataclass
class ClassName:
var1: str
var2: str
var3: str
var4: str
var5: str
This automatically defines an init method like this:
def __init__(self, var1: str, var2: str, var3: str, var4: str, var5: str):
self.var1 = var1
self.var2 = var2
self.var3 = var3
self.var4 = var4
self.var5 = var5
You could do something like this... Although this is pretty magic and not recommended.
class ClassName:
def __init__(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, value)
Used like
my_class = ClassName(first=1, second=2, third=3)
print(my_class.first) # 1
print(my_class.second) # 2
print(my_class.third) # 3
This requires you to provide all arguments as keyword arguments (e.g. key=value. This will error if you try to create the class with just values and no keys.
# This does not work
my_class = ClassName(1, 2, 3)
Again I have to reiterate that this is not recommended. Letting users of your class know exactly what variables they should be passing in to construct your class is extremely valuable.
myVar = ClassName(var1='a', var2='b'). You'd have add the parameter names when creating a new object.Use *args-style argument packing.
class class_name():
def __init__(self, *vars):
self.vars = vars
# now you can access self.vars[0], self.vars[1], etc.
dataclasses.dataclassdocs.python.org/3/library/dataclasses.htmlNamedTupleand pass them around that way.