import an excel sheet as dataframe, all values will be str() by default in python in python

You can use the pandas library to read an Excel file and convert it into a DataFrame. By default, pandas will try to infer the data types of the columns. However, if you want all values to be str by default, you can use the dtype parameter while reading the file.

Here's an example code snippet:

main.py
import pandas as pd

# read the Excel file and convert it to a DataFrame
df = pd.read_excel('path/to/excel/file.xlsx', dtype=str)

# display the DataFrame
print(df)
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In the code above, we are passing the dtype=str parameter while reading the Excel file. This will convert all values into strings by default. You can replace str with any other data type you want.

Once you have the DataFrame, you can perform various operations on it such as filtering, grouping, sorting, and more.