iterable-unpacking

How to group the same values into same key?

How to group the same values into same key? Question: I have an assignment to do this things without import any helpful function, could you guys help me? Thanks! data = [ [‘num’,’e1′,’e2′,’e3′], [‘2002′,’p’,’r’,’i’], [‘2002′,’k’,’r’,’i’], [‘2001′,’k’,’r’,’e’], [‘2004′,’p’,’a’,’p’], [‘2004′,’p’,’s’,’f’] ] newlist = [ {‘num’: ‘2001’, ‘e1’: ‘k’, ‘e2’: ‘r’, ‘e3’: ‘e’}, {‘num’: ‘2002’, ‘e1’: ‘p’, ‘e2’: …

Total answers: 1

Pandas list unpacking to multiple columns

Pandas list unpacking to multiple columns Question: I have a pandas DataFrame with one column containing lists, like: >>> import pandas as pd >>> d = {‘A’: [1, 2, 3], ‘B’: [[0.1, 0.2, 0.3], [0.4, 0.5, 0.6], [0.7, 0.8, 0.9]]} >>> df = pd.DataFrame(data=d) >>> df A B 0 1 [0.1, 0.2, 0.3] 1 2 …

Total answers: 2

How to automatically unpack list that contains some 0 values in Python?

How to automatically unpack list that contains some 0 values? Question: When I try to unpack a list data for a MySQL database query that has some columns with value 0, I get an error. Name (varchar) Apples(int) Candies(int) Color (varchar) John 5 0 Blue If I unpack my query result like: name, apples, candies, …

Total answers: 1

Accessing tuple with turtle on python

Accessing tuple with turtle on python Question: I’m still new to python and programming in general and it’s my first post here. I’m trying to draw a "house" shape with an X inside of it. I need to utilize a loop with a list that contains tuples which would be forward,left respectively. I figured what …

Total answers: 1

Unpacking: [x,y], (x,y), x,y – what is the difference?

Unpacking: [x,y], (x,y), x,y – what is the difference? Question: What is the difference in Python between unpacking a function call with [], with () or with nothing? def f(): return 0, 1 a, b = f() # 1 [a, b] = f() # 2 (a, b) = f() # 3 Asked By: rafoo || …

Total answers: 2

ValueError: not enough values to unpack (expected 2, got 1) when splitting strings

ValueError: not enough values to unpack (expected 2, got 1) when splitting strings Question: I’ve tried to write a script that moves files from one folder to a selection of folders depending on what I have named the file. For example, ‘Physics – a’ would be moved from the ‘ts’ folder to ‘/Physics/Assignments’ in an …

Total answers: 4

What does single(not double) asterisk * means when unpacking dictionary in Python?

What does single(not double) asterisk * means when unpacking dictionary in Python? Question: Can anyone explain the difference when unpacking the dictionary using single or double asterisk? You can mention their difference when used in function parameters, only if it is relevant here, which I don’t think so. However, there may be some relevance, because …

Total answers: 5

Type hints when unpacking a tuple?

Type hints when unpacking a tuple? Question: Is it possible to use type hinting when unpacking a tuple? I want to do this, but it results in a SyntaxError: from typing import Tuple t: Tuple[int, int] = (1, 2) a: int, b: int = t # ^ SyntaxError: invalid syntax Asked By: Cai || Source …

Total answers: 2

Understanding *x ,= lst

Understanding *x ,= lst Question: I’m going through some old code trying to understand what it does, and I came across this odd statement: *x ,= p p is a list in this context. I’ve been trying to figure out what this statement does. As far as I can tell, it just sets x to …

Total answers: 4