Catalog

One 、 Actual combat scene

Two 、 Main knowledge points

File read and write

Basic grammar

exception handling

Loop statement

string manipulation

3、 ... and 、 Rookie actual combat

1、 establish python file

 2、 Running effect

One 、 Actual combat scene

Actual combat scene : How to associate multiple files with multiple columns

Two 、 Main knowledge points

• File read and write

• Basic grammar

• exception handling

• Loop statement

• string manipulation

3、 ... and 、 Rookie actual combat

Make arrangements now ！

1、 establish python file

"""
Author: Rookie actual combat
Actual combat scene : How to associate multiple files with multiple columns
"""
# Import system package
import platform
print("Hello, Rookie actual combat ")
print(" Actual combat scene : How to associate multiple files with multiple columns ")
grade_dict = {}
# You need to create a file first py015_grade.txt
with open("py015_grade.txt", encoding="utf8") as f:
for line in f:
sno, grade = line.strip().split(",")
grade_dict[sno] = grade
print(grade_dict)
# You need to create a file first py015.txt
fout = open("py015.txt", "w", encoding="utf8")
with open("py015_student.txt", encoding="utf8") as f:
for line in f:
sno, sname = line.strip().split(",")
grade = grade_dict[sno]
# relation py015_student.txt、py015_grade.txt write in py015.txt
fout.write(f"{sno},{sname},{grade}\n")
# Close file stream
fout.close()
print("Python edition ", platform.python_version())

 2、 Running effect

  Rookie actual combat , Continuous learning !