python 读取 # 注释的配置文件

req_file = "requirements.txt"
'''
cffi==1.11.5
matplotlib==3.0.0
numpy==1.15.3
pandas==0.23.4
scikit-learn==0.20.0
# sklearn==0.0
torch==0.4.1
'''

def parse_requirements(filename):
    lineiter = (line.strip() for line in open(filename))
    return [line for line in lineiter if line and not line.startswith("#")]
    
parse_requirements(req_file)

['cffi==1.11.5',
 'matplotlib==3.0.0',
 'numpy==1.15.3',
 'pandas==0.23.4',
 'scikit-learn==0.20.0',
 'torch==0.4.1']