Python · Theory

Read Excel File in Python

Theory

70/268

Read Excel File in Python

Read Excel File is about tabular files. csv is in the stdlib. Excel usually needs openpyxl or pandas. Always with open(...) so the file closes.

For Read Excel File read: csv.reader or DictReader (column names). Write: writer / DictWriter. Don’t load a 2 GB file into memory if you can stream rows.

Read Excel File on the board — one row name,marks → Asha,90. Print it back. Same idea for Excel cells.

Read Excel File in Python — output: Asha 90. Excel cell (2,1) is the same idea; openpyxl reads the real file on your laptop.

Diagram

with open(...) as f
         │ read / write
         ▼
      auto close

Exam tip

stdlib csv vs Excel library. One sentence + tiny row example.

Example

# Read Excel File in Python
rows = [["name", "marks"], ["Asha", 90], ["Ravi", 85]]
print(rows[1][0], rows[1][1])
# openpyxl: ws.cell(2,1).value → Asha

Read Excel File in Python — output: Asha 90. Excel cell (2,1) is the same idea; openpyxl reads the real file on your laptop.

Short notes

DefRead Excel File reads or writes table files.
RuleRead Excel File — with open + csv/openpyxl.
RememberRead Excel File — DictReader uses column names.
TrapRead Excel File — file left open; wrong encoding.

Python · Theory

Read Excel File in Python

← All stacks

Theory

70/268

Read Excel File in Python

Read Excel File is about tabular files. csv is in the stdlib. Excel usually needs openpyxl or pandas. Always with open(...) so the file closes.

For Read Excel File read: csv.reader or DictReader (column names). Write: writer / DictWriter. Don’t load a 2 GB file into memory if you can stream rows.

Read Excel File on the board — one row name,marks → Asha,90. Print it back. Same idea for Excel cells.

Read Excel File in Python — output: Asha 90. Excel cell (2,1) is the same idea; openpyxl reads the real file on your laptop.

Diagram

with open(...) as f
         │ read / write
         ▼
      auto close

Exam tip

stdlib csv vs Excel library. One sentence + tiny row example.

Example

# Read Excel File in Python
rows = [["name", "marks"], ["Asha", 90], ["Ravi", 85]]
print(rows[1][0], rows[1][1])
# openpyxl: ws.cell(2,1).value → Asha

Read Excel File in Python — output: Asha 90. Excel cell (2,1) is the same idea; openpyxl reads the real file on your laptop.

Short notes

DefRead Excel File reads or writes table files.
RuleRead Excel File — with open + csv/openpyxl.
RememberRead Excel File — DictReader uses column names.
TrapRead Excel File — file left open; wrong encoding.

Read Excel File in Python

Example

Short notes

Questions

Read Excel File in Python

Example

Short notes

Questions