I paused at to checkout video on Decorators which I paused again to checkout video on Closures which I paused, yet again to checkout video on First Class Functions. Glad, I did. Thanks for the awesome videos.
At I am following along and it is not changing the raise amount by accessing the class method. Does anyone have any idea why this is happening?
i just rewatched a segment of the previous video and in this video and i think i'm right.
just so im clear: at using a classmethod on emp_1 to change the raise to 1.05 changes it for other instances too?
im at a hold up in. got error AttributeError: 'Employee' object has no attribute 'set_raise_amt' my code looks identical to yours. im using thorny on my pi as well if that makes any difference. Help would be appreciated. Thank you
Class method as alternative constructors
I noticed a small mistake at .When you split the string, you create new strings including the pay variable.If you were to execute the apply_raise() function on that new_emp_1 variable, the function would try to multiply a float by a string, getting an error.We need to convert that string to an integerSo that line 34. should read: new_emp_1 = Employee(first, last, int(pay))Same goes for the subsequent from_string classmethod created using the same way.
At is it possible to do call self._init_ inside the alternative constructor after parsing the original emp_str?
At would you be able to write:cls.first, cls.last, cls.pay = ...instead of:cls(first,last,pay)
couldnt you just do all of this in the constructor method? i mean i guess this can be useful if sometimes new employee is ordinarily instantiated and sometimes the data has to be parsed from a string
is a good pause stop
Best Python resource on YouTube. One question please, at I tried add one line for a verification purpose: new_emp_1.apply_raise() and found an issue: self.pay = int(self.pay * self.raise_amt) TypeError: can't multiply sequence by non-int of type 'float'. Not sure what I did wrong? Same issue occurred if I run your codes. Please help. Thank you very much.
Real World example with datetime module
example of datetime module
This really a good explanation. Being consistent with your methodology against known examples such as the datetimemodule () reinforces the learning experience. Thank you Corey.
Hey there. I explain this in my conditionals video. I talk about that at the mark in that video. I timestamped a link here:https://youtu.be/DZwmZ8Usvnk?t=9m27s
why there is underscore before time.localtime(t)?
Thank you for adding a real world example
Static Method
Static_Methods =
Best way to describe static methods is: Methods which function irrespective of the class or instance state. They are stateless...
code golf: you could replace lines 32-34 with one:return not day.weekday() in [5, 6]
I found for myself this syntax when you need a quick True/False check:
So, in , you used day.weekday(), but the weekday function has not been initialised before or has been mentioned before. How would the program know it has to take the modulus of the value with 7 and use that result to check whether it is a weekday?
on line 32 :Why not use in [5, 6] instead?
