How to search through dictionaries?
If you want to know if key is a key in people, you can simply use the expression key in people, as in: And to test if it is not a key in people:
python
Why am I getting ImportError: No module named pip ‘ right after installing pip?
Just be sure that you have include python to windows PATH variable, then run python -m ensurepip
List append() in for loop
The list.append function does not return any value(but None), it just adds the value to the list you are using to call that method. In the first loop round you will assign None (because the no-return of append) to a, then in the second round it will try to call a.append, as a is None … Read more
Split string using a newline delimiter with Python
str.splitlines method should give you exactly that.
Python way to clone a git repository
There is GitPython. Haven’t heard of it before and internally, it relies on having the git executables somewhere; additionally, they might have plenty of bugs. But it could be worth a try. How to clone: (It’s not nice and I don’t know if it is the supported way to do it, but it worked.)
TemplateDoesNotExist at /
Hej! Many threads here had the same caption, but none of them solved my problem. I have a Django site an can access /admin (but it looks ugly). But on / there appears the following error page (DEBUG = True in settings.py): In fact, the file /home/django/django/templates/iecl_dev/index.html does exist and I also tried chmod o+r … Read more
Could not install packages due to an EnvironmentError: [Errno 13]
If you want to use python3+ to install the packages you need to use pip3 install package_name And to solve the errno 13 you have to add –user at the end EDIT: For any project in python it’s highly recommended to work on a Virtual enviroment, is a tool that helps to keep dependencies required by different projects separate by creating isolated python virtual environments … Read more
Move column by name to front of table in pandas
We can use ix to reorder by passing a list: Another method is to take a reference to the column and reinsert it at the front: You can also use loc to achieve the same result as ix will be deprecated in a future version of pandas from 0.20.0 onwards:
Why do I get this error “TypeError: ‘method’ object is not iterable”?
You misunderstand the error message: It doesn’t say that a list would not be iterable, it says that a method isn’t. What happens is that your pieces list doesn’t contain pieces but references to the add_piece method because you forgot to call the method when you wanted to append its result in line 56. You could have found this … Read more
Inheritance and init method in Python
In the first situation, Num2 is extending the class Num and since you are not redefining the special method named __init__() in Num2, it gets inherited from Num. When a class defines an __init__() method, class instantiation automatically invokes __init__() for the newly-created class instance. In the second situation, since you are redefining __init__() in Num2 you need to explicitly call the one in the super class (Num) if you want … Read more