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Thread: How to split dataframe object rows to columns
Post: How to split dataframe object rows to columns
| Hi,
I have below data frame (multiple rows): I want to split rows at dilimiter to columns
df_obj:
20;12;AA;2020/11/05 10:23:13;2020/11/05 10:25:13;12;LL
20;12;PT;2020/11/05 11:18:13;2020/11/05 11:23... |
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Mekala |
General Coding Help |
1 |
2,515 |
Nov-12-2020, 02:31 PM |
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Thread: How to get index of minimum element between 3 & 8 in list
Post: How to get index of minimum element between 3 & 8 ...
| Hi,
I have the below list, and I want to get the index of minimum element which is >3 & <=8.
my_list = [-1,4,-5,0,2,11,9,8,6]
#below only grep minimum whose value >0
m = min(i for i in ... |
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Mekala |
General Coding Help |
2 |
2,537 |
Nov-10-2020, 10:44 AM |
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Thread: How to get indices of minimum time difference
Post: How to get indices of minimum time difference
| Hi,
I have below data:
df1:
time1 time2
2020/11/05 20:30:23 2020/11/05 20:20:23
2020/11/05 20:40:12 2020/11/05 20:20:23
2020/11/05 20:49:53 2020/11/05 20:20:23
2020/11/05 20:... |
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Mekala |
General Coding Help |
1 |
2,171 |
Nov-09-2020, 03:06 PM |
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Thread: Pandas, How to trigger parallel loop
Post: RE: How to trigger parallel loop
| (Oct-28-2020, 02:21 PM)Larz60+ Wrote: This is really a pandas question, not csv, as pandas reads in the data.
Yes, but more generally I would put it this way: how to trigger multithreading |
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Mekala |
General Coding Help |
4 |
2,745 |
Oct-29-2020, 12:58 PM |
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Thread: Pandas, How to trigger parallel loop
Post: RE: How to trigger parallel loop
| import os
import pandas as pd
df_result =pd.DataFrame()
directory = os.path.join("D:\\","\PythonCodes\inputmultifiles")
for root,dirs,files in os.walk(directory):
for file in files:
f ... |
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Mekala |
General Coding Help |
4 |
2,745 |
Oct-28-2020, 11:40 AM |
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Thread: How to read csv files parallay
Post: RE: How to read csv files parallay
| I use below code.
import os
import pandas as pd
df_result =pd.DataFrame()
directory = os.path.join("D:\\","\PythonCodes\inputmultifiles")
for root,dirs,files in os.walk(directory):
for file in ... |
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Mekala |
General Coding Help |
2 |
2,000 |
Oct-24-2020, 07:33 AM |
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Thread: How to read csv files parallay
Post: How to read csv files parallay
| Hi,
I have multiple CSV files in the folder, I want to read them parallelly. Each file takes 1min to read and do some calculations. I want to read CSV files simultaneously (parallelly) and concate the... |
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Mekala |
General Coding Help |
2 |
2,000 |
Oct-23-2020, 02:22 PM |
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Thread: Pandas, How to trigger parallel loop
Post: Pandas, How to trigger parallel loop
| Hi,
I have multiple CSV files in the folder, and I need to read each file and some calculation (like getting the first coulmn sum) and concate to result_df. Is there any method in python? to achieve t... |
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Mekala |
General Coding Help |
4 |
2,745 |
Oct-23-2020, 01:05 PM |
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Thread: How to grep corresponding value in another df
Post: RE: How to grep corresponding value in another df
| I am not very familiar of DataFrame.join(). My purpose is to take "df" is actual, and df2 is target. and want to calculate difference between actual (in df1) and target in df2 for sun1, sub2, rank1 co... |
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Mekala |
General Coding Help |
2 |
1,877 |
Oct-13-2020, 02:52 PM |
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Thread: How to grep corresponding value in another df
Post: How to grep corresponding value in another df
| Hi,
I have two data frames,
df1:
Model group type sub1 sub2 rank1 status
200B R2R v1 5 6 3 Y
200C Mon v2 12 3.2 9 Y
200B Mon v1 3 8.9 5 ... |
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Mekala |
General Coding Help |
2 |
1,877 |
Oct-13-2020, 02:13 PM |
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Thread: How to check spec table in another df
Post: How to check spec table in another df
| Hi,
I have data frame as below:
group subgroup category name T S P R
A1 W 1 MAK 2 5.1 2 6
A1 L 2 RAL 2 5 2 ... |
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Mekala |
General Coding Help |
0 |
1,428 |
Oct-11-2020, 02:25 PM |
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Thread: How to print n days back date at give time
Post: How to print n days back date at give time
| Hi,
I want to print "N" days back date with specified time. I use below code but it error:
from datetime import datetime, timedelta
Quote:N = 2
date_N_days_ago = datetime.now().strftime("%Y-%M-%D 07:... |
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Mekala |
General Coding Help |
1 |
1,993 |
Oct-10-2020, 02:54 AM |
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Thread: Make list of dates between today back to n days
Post: RE: Make list of dates between today back to n day...
| I corrected, but still give empty (no error)
from datetime import date, datetime, timedelta
def datetime_range(start, end, delta):
current = start
print(current)
if not isinstance(delta, ... |
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Mekala |
General Coding Help |
3 |
2,398 |
Oct-03-2020, 09:26 AM |
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Thread: Make list of dates between today back to n days
Post: Make list of dates between today back to n days
| Hi,
I want to make list of dates from now back to n days (for example 2 days) with time interval 12hrs.
I use the bewlow code, but its giving me empty.
from datetime import date, datetime, timedelta... |
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Mekala |
General Coding Help |
3 |
2,398 |
Oct-01-2020, 10:05 AM |
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Thread: How to melt dataframe multiple columns to one column
Post: How to melt dataframe multiple columns to one colu...
| Hi,
I have below dataframe, I want to melt all columns to one column. I use below code, but some thing I am missing
import pandas as pd
df = pd.DataFrame({'ID':['A1','A2','A1'],\
'Estart':[1,2,3],\
... |
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Mekala |
General Coding Help |
1 |
2,884 |
Sep-23-2020, 10:35 PM |
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Thread: Create a sequential number (counter) and reset at each duplicate
Post: Create a sequential number (counter) and reset at ...
| Hi,
I want to assign serial number but reset at repeating row
I use the below code, but I am not achieving the desired output.
import pandas as pd
df = pd.DataFrame({'ID':['A1','A2','A1','A3','A4',... |
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Mekala |
General Coding Help |
0 |
1,739 |
Sep-20-2020, 05:02 AM |
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Thread: How to reset row value in pandas
Post: How to reset row value in pandas
| Hi,
I have below dataframe:
df
ID Grp subGrp Rank SNO
A.1 A.0 A S 1
A.2 A.0 A S 1
A.2 A.0 A N 1
A.6 A.0 A N 1
A.3 A.0 A S 1
A.1 A.B A ... |
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Mekala |
General Coding Help |
0 |
1,538 |
Sep-19-2020, 09:36 AM |
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Thread: How to diff pandas rows and modify column value
Post: RE: How to diff pandas rows and modify column valu...
| I used below:
df['value'] = (df[['sub_set']] != df[['sub_set']].shift()).any(axis=1).cumsum()but I dont want to sum. I want to reset row value to 1, and increase continuously until next instance(next ... |
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Mekala |
General Coding Help |
1 |
1,706 |
Sep-18-2020, 12:38 PM |
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Thread: How to diff pandas rows and modify column value
Post: How to diff pandas rows and modify column value
| Hi,
I have bewlow pandas dataframe:
ID sub_set group Rank
A1 A.0 A 1
A2 A.0 A 2
A1 A.1 A 3
A3 A.0 A 4
A4 A.0 A 5
A5 A.0 A 6I want to re... |
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Mekala |
General Coding Help |
1 |
1,706 |
Sep-18-2020, 11:35 AM |
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Thread: How to mark duplicate rows in pandas
Post: RE: How to mark duplicate rows in pandas
| I tried as below:
idx= df.duplicated(['ID', 'Pop', 'SG','Stg']).tolist()
indexes = [n for n,x in enumerate(idx) if x==True]
df['new_col']='NOR'
df['new_col'].iloc[indexes]='DUP'but there is a warning... |
|
Mekala |
General Coding Help |
3 |
2,564 |
Sep-17-2020, 01:43 PM |
