python 判断路径是否存在，不存在就创建该路径de代码
path = 'E:/sub01/肖战'
if not os.path.exists(path):
os.makedirs(path)
else:
print('路径已存在')
python 关于路径的拼接问题
path = 'E:/PyEVM-master/PyEVM-master/'
allPath = os.path.join(path,'sub01')
print(allPath)
输出：
E:/PyEVM-master/PyEVM-master/sub01
python 路径拼接也可以用‘+’号实现—相当于字符串的连接
path = 'E:/PyEVM-master/PyEVM-master'
#allPath = path + '/' + 'sub01'
allPath = path + '/sub01'
print(allPath)
输出：
E:/PyEVM-master/PyEVM-master/sub01
