Valueerror: excel file format cannot be determined, you must specify an engine manually.

Query:

valueerror: excel file format cannot be determined, you must specify an engine manually.

Explanation:

This error occurs when reading an Excel file in Python using the pandas library, but the file format cannot be determined automatically. To fix this error, you need to specify the engine manually.

Example:

Suppose you have an Excel file named “data.xlsx” and you are trying to read it using pandas.

import pandas as pd

# Incorrect way without specifying the engine
df = pd.read_excel("data.xlsx")

# This will raise the ValueError: excel file format cannot be determined

# Correct way by specifying the engine
df = pd.read_excel("data.xlsx", engine="openpyxl")

# The 'engine' parameter explicitly specifies the engine to use for reading the Excel file.
# In this example, we are using the 'openpyxl' engine which is compatible with the newer .xlsx file format.

print(df)
  

By specifying the engine as “openpyxl” in the read_excel function, pandas will be able to read the Excel file correctly without raising the ValueError.