I am trying to convert a list of strings to a list of letters/numbers but keeping the length of list the same. Here is my list look like,
a = ["0587828028", "2967480535"]
My code to convert the above list to split the string and save in a new list.
new_a = []
for i in range(len(a)):
new_a += a[i]
And the output is on list,
['0', '5', '8', '7', '8', '2', '8', '0', '2', '8', '2', '9', '6', '7', '4', '8', '0', '5', '3', '5']
Desired output should be 2 list:
['0', '5', '8', '7', '8', '2', '8', '0', '2', '8'] ['2', '9', '6', '7', '4', '8', '0', '5', '3', '5']
Any suggestion is much appreciated, I am very new in python.
Just use the built-in list() iterable expansion:
a = ["0587828028", "2967480535"]
new_a = [list(x) for x in a]
# [['0', '5', '8', '7', '8', '2', '8', '0', '2', '8'],
# ['2', '9', '6', '7', '4', '8', '0', '5', '3', '5']]
Related
While swapping in python using rindex for this specific case why swapping is not happening? Case-1 is giving correct ans, but not case-2.
Case-1:
S=['1', '1', '1', '2', '1', '1']
S[S.index('1')], S[''.join(S).rindex('2')] = S[''.join(S).rindex('2')], S[S.index('1')]
print(S)
Output: ['2', '1', '1', '1', '1', '1']
Case-2:
S=['2', '1', '1', '1', '1', '1']
S[S.index('1')], S[''.join(S).rindex('2')] = S[''.join(S).rindex('2')], S[S.index('1')]
print(S)
Output: ['2', '1', '1', '1', '1', '1']
But Expected Output: ['1', '2', '1', '1', '1', '1']
Calculate your indices before doing the swap, not in the middle of it:
index1, index2 = S.index('1'), ''.join(S).rindex('2')
S[index1], S[index2] = S[index2], S[index1]
I'm new to Python and coding in general (so the following code wont be the cleanest) but coming across the following issue that I can't seem to crack:
Problem
I have 2 CSVs which I'm converting to dictionaries and passing to a function one after another, in order to take the dictionary keys and append them to a list outside of the function, I'm having an issue with:
1 - When printing DataList within the function, it returns a result - when I call it from main.py, returns empty list
2 - The ultimate aim is to remove duplicates after collating data into one list (DataList). Within the function, when I'm appending ClearedValues to DataList, since my lists from the CSVs contain 1-6 in first & 1-7 in second, I'd expect the output (after the function has been run twice) to be:
This is the required DataList within function
[['1', '2', '3', '4', '5', '6'], ['1', '2', '3', '4', '5', '6', '7']]
Instead, there is an additional "7" within DataList[0], see output
cleaner.py:
def DictCleaner(dictionary):
CleanedValues.clear()
for k, v in dictionary.items():
if v != None:
CleanedValues.append(v)
DataList.append(CleanedValues)
print(f"This is the CleanedValues {CleanedValues}”)
print(f"This is the DataList inside the function {DataList}")
main.py
loadCSVs("DataSet1.csv")
print(f"This is the main.py DataList list after 1 run {DataList}")
loadCSVs("DataSet2.csv")
print(f"This is the main.py DataList after the 2 runs {DataList}")
Where CleanedValues and DataLists are lists declared within cleaner.py outside of the function scope
& loadCSVs() is the function that reads the CSV, coverts to a dictionary and returns DictCleaner() with the new dictionary as parameter
Output:
This is the CleanedValues [['1', '2', '3', '4', '5', '6']]
This is the DataList inside the function ['1', '2', '3', '4', '5', '6']
This is the main.py DataList list after 1 run [['1', '2', '3', '4', '5', '6']]
This is the CleanedValues ['1', '2', '3', '4', '5', '6', '7']
This is the DataList inside the function [['1', '2', '3', '4', '5', '6', '7'], ['1', '2', '3', '4', '5', '6', '7']]
This is the main.py DataList after the 2 runs [['1', '2', '3', '4', '5', '6', '7']], ['1', '2', '3', '4', '5', '6', '7']]
Expected output:
This is the DataList inside the function [['1', '2', '3', '4', '5', '6']]
This is the CleanedValues ['1', '2', '3', '4', '5', '6']
This is the main.py DataList list after 1 run [['1', '2', '3', '4', '5', '6']]
This is the DataList inside the function [['1', '2', '3', '4', '5', '6'], ['1', '2', '3', '4', '5', '6', '7']]
This is the CleanedValues ['1', '2', '3', '4', '5', '6', '7']
This is the main.py DataList after the 2 runs [['1', '2', '3', '4', '5', '6'], ['1', '2', '3', '4', '5', '6', '7']]
Any suggestions to optimize code or otherwise are greatly appreciated.
I want to be able to just search for all digits in a text file and find the max number, using the re module. Where do I need to edit my code to accomplish this goal?
The random.txt looks somthing like the following:
Datq15UxkNwMN5zUQhd46J8WeF9RjAq214TlJiQ8EkZvmdOpmBOdd365mICKC67GGvqwbLqV2Gox3n3E5WC1Vq8C22lZ6sL3Ip24untQyw46g2219WlA07GP30PNvc8o3hCb2d283l68mh86RH6gDNbN7kIXmdO4a84hUz73905o3BlR71YCQF985JTz54FRoN32pM8N23YcYd7jv9Ys575UzaH9RZ7sosMdeqnTgnVt0bH99b2P5ilvJ33QaJ6G76VU8vPN
import re
with open('content.txt', 'r',) as f:
contents = f.read()
number = 0
pattern = re.compile(r'\d')
matches = pattern.finditer('content.txt')
for match in matches:
n = int(match)
if saved <= n:
number = int(match)
print(number)
the file just ran once and gave me the answer 0
Try this,
import re
with open('file1.txt', 'r') as f:
data = f.read()
list_of_numbers = re.findall(r'(?:[\d]+)',data)
list_of_numbers = map(int, list_of_numbers)
print(max(list_of_numbers))
Output:
73905 # max number
your list_of_numbers look like this
['15', '5', '46', '8', '9', '214', '8', '365', '67', '2', '3', '3', '5', '1',
'8', '22', '6', '3', '24', '46', '2219', '07', '30', '8', '3', '2', '283', '68',
'86', '6', '7', '4', '84', '73905', '3', '71', '985', '54', '32', '8', '23', '7',
'9', '575', '9', '7', '0', '99', '2', '5', '33', '6', '76', '8']
You are looking for matches within "content.txt" string so there is no match. Also a MatchObject can't be converted to int:
import re
with open('content.txt', 'r',) as f:
contents = f.read()
number = 0
pattern = re.compile(r'\d+')
matches = pattern.finditer(contents)
for match in matches:
n = int(match.group(0))
if number <= n:
number = int(match.group(0))
print(number)
Hi am trying to concatenate every third item into one item:
I have :
dic = ['3', '3', '⛂', '3', '4', '⛀', '4', '3', '⛀', '4', '4', '⛂']
what i would like is to find a way to create a list of list with every third item
like
dic = [['3', '3', '⛂'], ['3', '4', '⛀'], ['4', '3', '⛀'], ['4', '4', '⛂']]
Here you go!
dic = ['3', '3', '⛂', '3', '4', '⛀', '4', '3', '⛀', '4', '4', '⛂']
lst=[]
for i in range(0,len(dic),3):
lst.append(dic[i:i+3])
print(lst)
Output:
[['3', '3', '⛂'], ['3', '4', '⛀'], ['4', '3', '⛀'], ['4', '4', '⛂']]
A function in a program I'm working on takes a list of quiz scores, and asks the user to input the name of a round and the score. If the round already exists, it appends the new score to the existing list, otherwise it adds the round and its score to the top-layer of the list:
lines = [['geography', '8', '4', '7'],
['tv and cinema', '4', '4', '8', '7', '7'],
['all creatures great and small', '7', '8'],
['odd one out', '4', '7'],
['music', '3', '5', '8', '8', '7'],
['how many', '4']]
roundName = input("Enter the name of the round to add: ")
score = input("Enter the score for that round: ")
for line in lines:
if roundName in line:
line.append(score)
lines.append([roundName, score])
#for line in lines:
# if line[0] == roundName.lower().strip():
# existingRound = lines.index(line)
# lines[existingRound].append(score)
# else:
# newRound = [roundName, score]
# lines.append(newRound)
The commented part represents my first few attempts. Entering how many, 3 should result in
lines = [['geography', '8', '4', '7'],
['tv and cinema', '4', '4', '8', '7', '7'],
['all creatures great and small', '7', '8'],
['odd one out', '4', '7'],
['music', '3', '5', '8', '8', '7'],
['how many', '4', '3']]
#actually results, in
[['geography', '8', '4', '7'],
['tv and cinema', '4', '4', '8', '7', '7'],
['all creatures great and small', '7', '8'],
['odd one out', '4', '7'],
['music', '3', '5', '8', '8', '7'],
['how many', '4', '3'],
['how many', '3']]
I can't get the logic in the loop right. Where am I going wrong?
for line in lines:
if roundName in line:
line.append(score)
lines.append([roundName, score])
Right here you're adding the new round to lines regardless of whether if it was present in lines already. Just use a boolean to indicate if adding to lines is needed and then change appending the new round to lines to a conditional:
add = True
for line in lines:
if roundName in line:
line.append(score)
add = False
if add: lines.append([roundName, score])
If order doesn't matter though it would be much easier to use a dictionary:
lines = {'geography':['8', '4', '7'], 'tv and cinema': [...] ...}
roundName = input("Enter the name of the round to add: ")
score = input("Enter the score for that round: ")
if roundName in lines: lines[roundName].append(score)
else: lines[roundName] = [score]