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Python enumerate list to str


Python enumerate list to str

By : manu4320
Date : November 21 2020, 03:00 PM
this will help How do I do a quick search for element in the list of lists, looking for getting True in the output of last command below. Also is there a quick way to get the index ('0' and '2' in the example) instead of looping thru the list? , Combine list comprehension with index syntax and enumerate
code :
l=[['10.98.78.235', '1'], ['10.98.78.236', '2'], ['10.98.78.235', '1']]

search=['10.98.78.235', '1']
indexes=[index for index,item in enumerate(l) if search in [item] ] ]

print indexes
[0, 2]
l=[['10.98.78.235', '1'], ['10.98.78.236', '2'], ['10.98.78.235', '10']]

search='10.98.78.235'
indexes=[index for index,item in enumerate(l) if search in item ]

print indexes
[0, 2]


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How do I enumerate() over a list of tuples in Python?

How do I enumerate() over a list of tuples in Python?


By : don gh
Date : March 29 2020, 07:55 AM
seems to work fine I've got some code like this: , This is a neat way to do it:
code :
letters = [('a', 'A'), ('b', 'B')]
for i, (lowercase, uppercase) in enumerate(letters):
    print "Letter #%d is %s/%s" % (i, lowercase, uppercase)
Using enumerate in Python to iterate up to len(list) - 1

Using enumerate in Python to iterate up to len(list) - 1


By : Fi.
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further If I have a list , Slice the list you provide to enumerate to achieve a similar effect:
code :
for i, item in enumerate(A[:-1]):
    print(item, end=' ')
how do I get values into a list with enumerate in python?

how do I get values into a list with enumerate in python?


By : GreyGoose
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You can solve this using a second list comprehension, or if you post your initial data, there is probably a way to avoid having to create a second list:
code :
your_list = [{'id': 1, 'name': 'person'}, {'id': 1, 'name': 'person'}, {'id': 3, 'name': 'car'}, {'id': 1, 'name': 'person'}, {'id': 1, 'name': 'person'}, {'id': 1, 'name': 'person'}, {'id': 1, 'name': 'person'}, {'id': 3, 'name': 'car'}, {'id': 1, 'name': 'person'}, {'id': 3, 'name': 'car'}]


name = [item['name'] for item in your_list]
['person', 'person', 'car', 'person', 'person', 'person', 'person', 'car', 'person', 'car']
print ([category_index.get(value) for index,value in enumerate(classes[0]) if scores[0,index] > 0.5])
your_list = [category_index.get(value) for index,value in enumerate(classes[0]) if scores[0,index] > 0.5]
name = [item['name'] for item in your_list]
Python: How to enumerate over a list of lists and use the length of that list to find values

Python: How to enumerate over a list of lists and use the length of that list to find values


By : user2509207
Date : March 29 2020, 07:55 AM
Hope this helps len(Reels[i]) is not a valid index for Reels[i]. The last valid index is len(Reels[i]) - 1
How do I use enumerate in Python to compute STD of a list?

How do I use enumerate in Python to compute STD of a list?


By : user3508420
Date : March 29 2020, 07:55 AM
wish of those help I would consider using pandas for this. It is a library that allows for efficient processing of datasets in numpy arrays and takes all the looping and indexing out of your hands.
In this case I would define a dataframe with N_raytimes rows and N_Height columns, which would allow to easily slice and aggregate the data any way you like.
code :
import pandas as pd
import numpy as np

vr = [
    [2.0, 3.1, 4.1, np.nan],
    [3.1, 4.1, np.nan, 5.1],
    [2.1, np.nan, 6.1, 20.1]
]
Height = [10.0, 20.0, 30.0, 40]
raytimes = [0, 0.1, 0.2]

# Define a dataframe with the data
df = pd.DataFrame(vr, columns=Height, index=raytimes)
df.columns.name = "Height"
df.index.name = "raytimes"

# Split it out (this could be more elegant)
w1 = df[df.index < 0.25]
w2 = df[(df.index >= 0.25) & (df.index < 0.5)]
w3 = df[(df.index >= 0.5) & (df.index < 0.75)]
w4 = df[df.index >= 0.75]

# Compute standard deviations
w1sd = w1.std(axis=0, ddof=0).values
w2sd = w2.std(axis=0, ddof=0).values
w3sd = w3.std(axis=0, ddof=0).values
w4sd = w4.std(axis=0, ddof=0).values
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