Realization of DataFrame Exchange Column Sequence Method in Pandas

1. Get the DataFrame column label

import pandas as pd 
file_path = '/Users/Arithmetic/da-rnn-master/data/collectd67_power_after_test_smooth.csv' 
dataset = pd.read_csv(file_path)
cols = list(dataset)

['ps_state-stopped', 'ps_state-running', 'ps_state-blocked', 'ps_state-paging', 'ps_state-sleeping', 'ps_state-zombies', 'fork_rate', 'cpu-2-system', 'cpu-2-nice', 'cpu-2-steal',...]

2. Change the column labels to the specified order

import pandas as pd

file_path = '/Users/Arithmetic/da-rnn-master/data/collectd67_power_after_test_smooth.csv'
 
dataset = pd.read_csv(file_path)
cols = list(dataset)
print(cols)
cols.insert(0, cols.pop(cols.index('ps_state-running')))
print(cols)

Here, changing the position order of the first column and the second column uses two methods in python list

insert method:
1. Functions
The insert () function is used to insert the specified object into the list at the specified location.
2. Grammar
list.insert(index, obj)
3. Parameters
index: The index location where the object obj needs to be inserted.
obj: Inserts an object in the list.
The pop () function removes one element from the list (the last by default) and returns the value of that element

3. Using loc to obtain new DataFrame, and copying DataFrame after exchange sequence

import pandas as pd

file_path = '/Users/Arithmetic/da-rnn-master/data/collectd67_power_after_test_smooth.csv'
 
dataset = pd.read_csv(file_path)
cols = list(dataset)
print(cols)
cols.insert(0, cols.pop(cols.index('ps_state-running')))
print(cols)
data = dataset.loc[:, cols]

4. Save csv to overwrite the original csv

import pandas as pd
 
file_path = '/Users/Arithmetic/da-rnn-master/data/collectd67_power_after_test_smooth.csv'

dataset = pd.read_csv(file_path)
cols = list(dataset)
print(cols)
cols.insert(0, cols.pop(cols.index('ps_state-running')))
print(cols)
data = dataset.loc[:, cols]
data.to_csv(file_path, index=False)

5. You can do the same

import pandas as pd
 
file_path = '/Users/Arithmetic/da-rnn-master/data/collectd67_power_after_test_smooth.csv'
 
dataset = pd.read_csv(file_path)
cols = list(dataset)
print(cols)
cols.insert(0, cols.pop(cols.index('ps_state-running')))
print(cols)
dataset.loc[:, ['ps_state-running', 'ps_state-stopped']] = dataset[['ps_state-stopped', 'ps_state-running']].values
dataset.columns = cols
dataset.to_csv(file_path, index=False)