os.path.join()使用过程中遇到的坑

• linux 路径的拼接的方式是斜杠/， win 的拼接反斜杠\
• 我在os.path.join() 使用过程中发现 如果被拼接的路径开头存在斜杠或者反斜杠 拼接路径会从斜杠或者反斜杠处截断(win系统中)，如果是linux 系统 则斜杠会截断，反斜杠不会。
• 代码实例如下：

win 系统

a_path_win = "http://www.baidu.com"
b_path_win = "data/img"
path_join = os.path.join(a_path_win, b_path_win) # 路径的搜索方式是反斜杠\
print(f"sys = {
      sys.platform}")
print(f"path_join_win = {
      path_join}")

打印的结果

sys = win32
path_join_win = http://www.baidu.com\data/img

c_path_win = "/data/img"
path_join_win_1 = os.path.join(a_path_win, c_path_win)
print(f"path_join_win_1 = {path_join_win_1}")

打印的结果

path_join_win_1 = /data/img  # 在斜杠处截断

d_path_win = "\data\img"
path_join_win_2 = os.path.join(a_path_win, d_path_win)
print(f"path_join_win_2 = {
      path_join_win_2}")

打印的结果

path_join_win_2 = \data\img # 在反斜杠处截断

Linux 系统

a_path = "http://www.baidu.com"
b_path = "data/img"
path_join = os.path.join(a_path, b_path)
print(f"{
      sys.platform}")
print(f"path_join = {
      path_join}")

打印的结果

linux
path_join = http://www.baidu.com/data/img

c_path = "/data/img"
path_join_1 = os.path.join(a_path, c_path)
print(f"path_join_1= {
      path_join_1}")

打印的结果

path_join_1= /data/img  # 斜杠同样会截断

d_path = "\data\img"
path_join_2 = os.path.join(a_path, d_path)
print(f"path_join_2 = {
      path_join_2}")

打印的结果

path_join_2 = http://www.baidu.com/\data\img  #反斜杠不会截断，会拼接

FAQ

os.path.join 在win系统下遇到反斜杠和斜杠都在此处截断，在linux 系统下遇到斜杠会截断，反斜杠不会，在拼接路径时一定要把开头处的斜杠或者反斜杠处理掉吗，要不然会出现找不到路径的情况