In cmd window,
To install,
python -m pip install notebook
To use,
jupyter notebook
In cmd window,
To install,
python -m pip install notebook
To use,
jupyter notebook
Method 1.
python -m pip install pyinstaller
python -m PyInstaller --noconfirm --onefile --windowed code.py
Method 2.
python -m pip install auto-py-to-exe
python -m auto_py_to_exe
To dynamically adjust all the column lengths,
writer = pd.ExcelWriter('temp.xlsx')
df.to_excel(writer, sheet_name='sheetName', index=False)
for column in df:
column_length = max(df[column].astype(str).map(len).max(), len(column))
col_idx = df.columns.get_loc(column)
writer.sheets['sheetName'].set_column(col_idx, col_idx, column_length)
writer.close()
To manually adjust a column using column name,
col_idx = df.columns.get_loc('columnName')
writer.sheets['sheetName'].set_column(col_idx, col_idx, 20)
To manually adjust a column using column index,
writer.sheets['sheetName'].set_column(col_idx, col_idx, 20)
Potential error messages:
AttributeError: 'Worksheet' object has no attribute 'set_column'
--> install "xlsxwriter" module
--> use the installed as the engine, writer = pd.ExcelWriter('temp.xlsx', engine='xlsxwriter')
We can remove "FutureWarning" messages in Python programs by adding:
import warnings
warnings.simplefilter(action='ignore', category=FutureWarning)
To get the CD-key of current Windows,
1. run PowerShell or cmd
2. execute either
wmic path softwareLicensingService get OA3xOriginalProductKey
or
powershell "(Get-WmiObject -query 'select * from SoftwareLicensingService').OA3xOriginalProductKey"
To join two dataframe (df1, df2) according to specific column (e.g., X,Y,Z),
# merge two dataframe comparing X column data of df1 and Y column data of df2
# merge rows where X value on df1 is same to Y value of df2 (other rows will be abandoned)
# in the merged dataframe, "_x" will be added to column label of df1 and "_y" will be added to column label of df2pd.merge(df1, df2, left_on="X", right_on="Y")
# comparing multiple columns
# rows with same X, Y, Z values on df1 and df2 will merge (other rows will be abandoned)
# in the merged dataframe, "_x" will be added to column label of df1 and "_y" will be added to column label of df2
pd.merge(df1, df2, left_on=['X ','Y','Z'], right_on=['X ','Y','Z'])
import numpy as np import pandas as pd a = [['10', '1.2', '4.2'], ['15', '70', '0.03'], ['8', '5', '0']] df = pd.DataFrame(a, columns=['one', 'two', 'three']) df['que'] = np.where((df['one'] >= df['two']) & (df['one'] <= df['three']), df['one'], np.nan)