Python基础:模块化来搭项目

.
├── utils
│   ├── util.py
│   └── class_util.py
├── src
│   └── sub_main.py
└── main.py

# utils/utils.py

def get_sum(a, b):
    return a + b

# utils/class_utils.py

class Encoder(object):
    def encode(self, s):
        return s[::-1]

class Decoder(object):
    def decode(self, s):
        return ''.join(reverse(list(s)))

# main.py

from utils.utils import get_sum

print(get_sum(1, 2))

########## 输出 ##########

3

# src/sub_main.py

import sys
sys.path.append("..")

from utils.class_utils import *

encoder = Encoder()
decoder = Decoder()

print(encoder.encode('abcde'))
print(encoder.encode('edcba'))

########## 输出 ##########

edcba
abcde

├── proto
│   ├── mat.py
├── utils
│   └── mat_mul.py
└── src
    └── main.py

# proto/mat.py

class Matrix(object):
    def __init__(self, data):
        self.data = data
        self.n = len(data)
        self.m = len(data[0])

# utils/mat_mul.py

from proto.mat import Matrix

def mat_mul(matrix_1: Matrix, matrix_2: Matrix):
    assert matrix_1.m == matrix_2.n
    n, m, s = matrix_1.n, matrix_1.m, matrix_2.m
    result = [[0 for _ in range(n)] for _ in range(s)]
    for i in range(n):
        for j in range(s):
            for k in range(m):
                result[i][k] += matrix_1.data[i][j] * matrix_2.data[j][k]

    return Matrix(result)

# src/main.py

from proto.mat import Matrix
from utils.mat_mul import mat_mul


a = Matrix([[1, 2], [3, 4]])
b = Matrix([[5, 6], [7, 8]])

print(mat_mul(a, b).data)

########## 输出 ##########

[[19, 22], [43, 50]]

import sys

sys.path[0] = '/home/ubuntu/workspace/your_projects'

export PYTHONPATH="/home/ubuntu/workspace/your_projects"