Use this tag for questions related with argument unpacking, a technique that allows Arrays and Traversable objects to be extracted/unpacked into argument lists/sequences.
argument-unpacking is usually found in PHP, Python and Go.
Questions tagged [argument-unpacking]
144 questions
0
votes
2 answers
python argument unpacking puzzling behaviour
I have a problem understanding the process of argument unpacking from a list using the star operator in python.
I have followed the documentation entry and tried to re-create my own little example.
So I've defined a simple list of numbers:
list =…
Reut Sharabani
- 30,449
- 6
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- 88
0
votes
1 answer
How to unpack a tuple while calling an external method in Python?
I call a method of an external library multiple times in my class like this:
class MyClass:
const_a = "a"
const_b = True
const_c = 1
def push(self, pushee):
with ExternalLibrary.open(self.const_a, self.const_b,…
Bengt
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-1
votes
1 answer
Why do I need '**' when loading json (Python)
t1 = Tournament("Aeroflot Open", 2010)
json_data = json.dumps(t1.__dict__)
print(json_data)
t = Tournament(**json.loads(json_data)) # <-------------------
print(f"name = {t.name}, year = {t.year}")
Could someone explain me why do I need these two…
David
- 27
- 5
-1
votes
2 answers
not enough values to unpack (expected 4, got 1) within a funtion, python
def reademail():
f = open("Y11email.csv", "r")
line= "email"+ ","+"fname"+","+"sname"+"password"+"\n"
for line in f:
email,fname,sname,password=line.split(", ")#splits each line however creates an extra space between the lines because of enter
…
Ray
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- 1
- 4
-1
votes
3 answers
Merging two dic in python3 using Unpacking Generalisations in Python3.5
There are two dictionaries as follow which I want to merge them, my point is to select those keys that I am interested in, for example I am interested in all the keys except county. Solution I 've used is using del function after creating your new…
pm1359
- 622
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- 31
-1
votes
2 answers
How to convert the x of for x in seq to seq
This is a follow-up question to this SO-post.
Given this block of code (csvData1 is a .csv file.)
let mappedSeq1 = seq { for csvRow in csvData1 do yield (csvRow.[2], csvRow.[5]) }
for x in mappedSeq1 do
printfn "%A" x
What if I don't want to…
octopusgrabbus
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- 131
-2
votes
2 answers
python variable unpacking fails
7.10 and for some reason the following code snippet is producing an error...
device_info = {'username': 'test', 'password': 'test', 'appliance': 'name', 'hostname': 'hostname', 'prodcut': 'juice'}
print "{} {} {} {} {}".format(**device_info)
This…
user1537851
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- 3
-3
votes
1 answer
How to fix "Need more than 1 value to unpack"
I'm writing a program from "Learn Python the Hard Way - Third Edition" by Zed A. Shaw. I am new to programming and I am completely stuck on Exercise 12. Please look at my code and help me with what I am doing wrong, as for all I know it is exactly…
DamonT
- 15
- 4
-4
votes
2 answers
Splatpacking versus array_values() to re-index an array with numeric keys
As of PHP7.4, there is a newly available technique to re-index an array with numeric keys.
I'll call it "array re-packing" or maybe something fun like "splatpacking". The simple process involves using the splat operator (...) -- aka "spread…
mickmackusa
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