# Python iterate over path tree.
## 安装
你可以通过 [pypi](https://pypi.org/project/iterdir/) 安装
```console
pip install -U iterdir
```
## 使用
### 用作模块
提供了一个函数 `iterdir()` 可用于遍历目录树
```python
>>> from iterdir import iterdir
>>> help(iterdir)
Help on function iterdir in module iterdir:
iterdir(top=None, /, topdown: Optional[bool] = True, min_depth: int = 1, max_depth: int = 1, predicate: Optional[collections.abc.Callable[..., Optional[bool]]] = None, onerror: bool | collections.abc.Callable[[OSError], bool] = False, follow_symlinks: bool = False) -> collections.abc.Iterator
遍历目录树
:param top: 根路径，默认为当前目录。
:param topdown: 如果是 True，自顶向下深度优先搜索；如果是 False，自底向上深度优先搜索；如果是 None，广度优先搜索。
:param min_depth: 最小深度，小于 0 时不限。参数 `top` 本身的深度为 0，它的直接跟随路径的深度是 1，以此类推。
:param max_depth: 最大深度，小于 0 时不限。
:param predicate: 调用以筛选遍历得到的路径。可接受的参数与参数 `top` 的类型一致，参见 `:return:` 部分。
:param onerror: 处理 OSError 异常。如果是 True，抛出异常；如果是 False，忽略异常；如果是调用，以异常为参数调用之。
:param follow_symlinks: 是否跟进符号连接（如果为否，则会把符号链接视为文件，即使它指向目录）。
:return: 遍历得到的路径的迭代器。参数 `top` 的类型：
- 如果是 iterdir.DirEntry，则是 iterdir.DirEntry 实例的迭代器
- 如果是 pathlib.Path，则是 pathlib.Path 实例的迭代器
- 否则，得到 `os.fspath(top)` 相同类型的实例的迭代器
```
### 用作命令
提供一个命令行工具，用于导出目录树
```console
$ python -m iterdir -h
usage: __main__ [-h] [-m MIN_DEPTH] [-M MAX_DEPTH]
[-k [{inode,name,path,relpath,isdir,islink,stat} ...]]
[-t {log,json,csv}] [-d DUMP] [-de] [-s SELECT] [-se]
[-o OUTPUT_FILE]
[-hs [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...]]
[-dfs] [-fl] [-v]
[path]
目录树信息遍历导出
positional arguments:
path 文件夹路径，默认为当前工作目录
options:
-h, --help show this help message and exit
-m MIN_DEPTH, --min-depth MIN_DEPTH
最小深度，默认值 0，小于 0 时不限
-M MAX_DEPTH, --max-depth MAX_DEPTH
最大深度，默认值 -1，小于 0 时不限
-k [{inode,name,path,relpath,isdir,islink,stat} ...], --keys [{inode,name,path,relpath,isdir,islink,stat} ...]
选择输出的 key，默认输出所有可选值
-t {log,json,csv}, --output-type {log,json,csv}
输出类型，默认为 log
- log 每行输出一条数据，每条数据输出为一个 json 的 object
- json 输出一个 json 的 list，每条数据输出为一个 json 的 object
- csv 输出一个 csv，第 1 行为表头，以后每行输出一条数据
-d DUMP, --dump DUMP (优先级高于 -k/--keys、-hs/--hashes、-t/--output-type) 调用以导出数据，如果有返回值则再行输出，尾部会添加一个 b'
'。
如果结果 result 是
- None，跳过
- bytes，输出
- 其它，先调用 `bytes(str(result), 'utf-8')`，再输出
提供一个表达式（会注入一个变量 path，类型是 pathlib.Path）或函数（会传入一个参数，类型是 pathlib.Path）
-de, --dump-exec 对 -d/--dump 传入的代码用 exec 运行，其中必须存在名为 dump 的函数。否则，视为表达式或 lambda 函数
-s SELECT, --select SELECT
对路径进行筛选，提供一个表达式（会注入一个变量 path，类型是 pathlib.Path）或函数（会传入一个参数，类型是 pathlib.Path）
-se, --select-exec 对 -s/--select 传入的代码用 exec 运行，其中必须存在名为 select 的函数。否则，视为表达式或 lambda 函数
-o OUTPUT_FILE, --output-file OUTPUT_FILE
保存到文件，此时命令行会输出进度条
-hs [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...], --hashes [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...]
计算文件的哈希值，可以选择多个算法
-dfs, --depth-first 使用深度优先搜索，否则使用广度优先
-fl, --follow-symlinks
跟进符号连接，否则会把符号链接视为文件，即使它指向目录
-v, --version 输出版本
```
Raw data
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"description": "# Python iterate over path tree.\n\n## \u5b89\u88c5\n\n\u4f60\u53ef\u4ee5\u901a\u8fc7 [pypi](https://pypi.org/project/iterdir/) \u5b89\u88c5\n\n```console\npip install -U iterdir\n```\n\n## \u4f7f\u7528\n\n### \u7528\u4f5c\u6a21\u5757\n\n\u63d0\u4f9b\u4e86\u4e00\u4e2a\u51fd\u6570 `iterdir()` \u53ef\u7528\u4e8e\u904d\u5386\u76ee\u5f55\u6811\n\n```python\n>>> from iterdir import iterdir\n>>> help(iterdir)\n\nHelp on function iterdir in module iterdir:\n\niterdir(top=None, /, topdown: Optional[bool] = True, min_depth: int = 1, max_depth: int = 1, predicate: Optional[collections.abc.Callable[..., Optional[bool]]] = None, onerror: bool | collections.abc.Callable[[OSError], bool] = False, follow_symlinks: bool = False) -> collections.abc.Iterator\n \u904d\u5386\u76ee\u5f55\u6811\n \n :param top: \u6839\u8def\u5f84\uff0c\u9ed8\u8ba4\u4e3a\u5f53\u524d\u76ee\u5f55\u3002\n :param topdown: \u5982\u679c\u662f True\uff0c\u81ea\u9876\u5411\u4e0b\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff1b\u5982\u679c\u662f False\uff0c\u81ea\u5e95\u5411\u4e0a\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff1b\u5982\u679c\u662f None\uff0c\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\u3002\n :param min_depth: \u6700\u5c0f\u6df1\u5ea6\uff0c\u5c0f\u4e8e 0 \u65f6\u4e0d\u9650\u3002\u53c2\u6570 `top` \u672c\u8eab\u7684\u6df1\u5ea6\u4e3a 0\uff0c\u5b83\u7684\u76f4\u63a5\u8ddf\u968f\u8def\u5f84\u7684\u6df1\u5ea6\u662f 1\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\n :param max_depth: \u6700\u5927\u6df1\u5ea6\uff0c\u5c0f\u4e8e 0 \u65f6\u4e0d\u9650\u3002\n :param predicate: \u8c03\u7528\u4ee5\u7b5b\u9009\u904d\u5386\u5f97\u5230\u7684\u8def\u5f84\u3002\u53ef\u63a5\u53d7\u7684\u53c2\u6570\u4e0e\u53c2\u6570 `top` \u7684\u7c7b\u578b\u4e00\u81f4\uff0c\u53c2\u89c1 `:return:` \u90e8\u5206\u3002\n :param onerror: \u5904\u7406 OSError \u5f02\u5e38\u3002\u5982\u679c\u662f True\uff0c\u629b\u51fa\u5f02\u5e38\uff1b\u5982\u679c\u662f False\uff0c\u5ffd\u7565\u5f02\u5e38\uff1b\u5982\u679c\u662f\u8c03\u7528\uff0c\u4ee5\u5f02\u5e38\u4e3a\u53c2\u6570\u8c03\u7528\u4e4b\u3002\n :param follow_symlinks: \u662f\u5426\u8ddf\u8fdb\u7b26\u53f7\u8fde\u63a5\uff08\u5982\u679c\u4e3a\u5426\uff0c\u5219\u4f1a\u628a\u7b26\u53f7\u94fe\u63a5\u89c6\u4e3a\u6587\u4ef6\uff0c\u5373\u4f7f\u5b83\u6307\u5411\u76ee\u5f55\uff09\u3002\n \n :return: \u904d\u5386\u5f97\u5230\u7684\u8def\u5f84\u7684\u8fed\u4ee3\u5668\u3002\u53c2\u6570 `top` \u7684\u7c7b\u578b\uff1a\n - \u5982\u679c\u662f iterdir.DirEntry\uff0c\u5219\u662f iterdir.DirEntry \u5b9e\u4f8b\u7684\u8fed\u4ee3\u5668\n - \u5982\u679c\u662f pathlib.Path\uff0c\u5219\u662f pathlib.Path \u5b9e\u4f8b\u7684\u8fed\u4ee3\u5668\n - \u5426\u5219\uff0c\u5f97\u5230 `os.fspath(top)` \u76f8\u540c\u7c7b\u578b\u7684\u5b9e\u4f8b\u7684\u8fed\u4ee3\u5668\n```\n\n### \u7528\u4f5c\u547d\u4ee4\n\n\u63d0\u4f9b\u4e00\u4e2a\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u7528\u4e8e\u5bfc\u51fa\u76ee\u5f55\u6811\n\n```console\n$ python -m iterdir -h\nusage: __main__ [-h] [-m MIN_DEPTH] [-M MAX_DEPTH]\n [-k [{inode,name,path,relpath,isdir,islink,stat} ...]]\n [-t {log,json,csv}] [-d DUMP] [-de] [-s SELECT] [-se]\n [-o OUTPUT_FILE]\n [-hs [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...]]\n [-dfs] [-fl] [-v]\n [path]\n\n\u76ee\u5f55\u6811\u4fe1\u606f\u904d\u5386\u5bfc\u51fa\n\npositional arguments:\n path \u6587\u4ef6\u5939\u8def\u5f84\uff0c\u9ed8\u8ba4\u4e3a\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\n\noptions:\n -h, --help show this help message and exit\n -m MIN_DEPTH, --min-depth MIN_DEPTH\n \u6700\u5c0f\u6df1\u5ea6\uff0c\u9ed8\u8ba4\u503c 0\uff0c\u5c0f\u4e8e 0 \u65f6\u4e0d\u9650\n -M MAX_DEPTH, --max-depth MAX_DEPTH\n \u6700\u5927\u6df1\u5ea6\uff0c\u9ed8\u8ba4\u503c -1\uff0c\u5c0f\u4e8e 0 \u65f6\u4e0d\u9650\n -k [{inode,name,path,relpath,isdir,islink,stat} ...], --keys [{inode,name,path,relpath,isdir,islink,stat} ...]\n \u9009\u62e9\u8f93\u51fa\u7684 key\uff0c\u9ed8\u8ba4\u8f93\u51fa\u6240\u6709\u53ef\u9009\u503c\n -t {log,json,csv}, --output-type {log,json,csv}\n \u8f93\u51fa\u7c7b\u578b\uff0c\u9ed8\u8ba4\u4e3a log\n - log \u6bcf\u884c\u8f93\u51fa\u4e00\u6761\u6570\u636e\uff0c\u6bcf\u6761\u6570\u636e\u8f93\u51fa\u4e3a\u4e00\u4e2a json \u7684 object\n - json \u8f93\u51fa\u4e00\u4e2a json \u7684 list\uff0c\u6bcf\u6761\u6570\u636e\u8f93\u51fa\u4e3a\u4e00\u4e2a json \u7684 object\n - csv \u8f93\u51fa\u4e00\u4e2a csv\uff0c\u7b2c 1 \u884c\u4e3a\u8868\u5934\uff0c\u4ee5\u540e\u6bcf\u884c\u8f93\u51fa\u4e00\u6761\u6570\u636e\n -d DUMP, --dump DUMP (\u4f18\u5148\u7ea7\u9ad8\u4e8e -k/--keys\u3001-hs/--hashes\u3001-t/--output-type) \u8c03\u7528\u4ee5\u5bfc\u51fa\u6570\u636e\uff0c\u5982\u679c\u6709\u8fd4\u56de\u503c\u5219\u518d\u884c\u8f93\u51fa\uff0c\u5c3e\u90e8\u4f1a\u6dfb\u52a0\u4e00\u4e2a b'\n '\u3002\n \u5982\u679c\u7ed3\u679c result \u662f\n - None\uff0c\u8df3\u8fc7\n - bytes\uff0c\u8f93\u51fa\n - \u5176\u5b83\uff0c\u5148\u8c03\u7528 `bytes(str(result), 'utf-8')`\uff0c\u518d\u8f93\u51fa\n \u63d0\u4f9b\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff08\u4f1a\u6ce8\u5165\u4e00\u4e2a\u53d8\u91cf path\uff0c\u7c7b\u578b\u662f pathlib.Path\uff09\u6216\u51fd\u6570\uff08\u4f1a\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\uff0c\u7c7b\u578b\u662f pathlib.Path\uff09 \n -de, --dump-exec \u5bf9 -d/--dump \u4f20\u5165\u7684\u4ee3\u7801\u7528 exec \u8fd0\u884c\uff0c\u5176\u4e2d\u5fc5\u987b\u5b58\u5728\u540d\u4e3a dump \u7684\u51fd\u6570\u3002\u5426\u5219\uff0c\u89c6\u4e3a\u8868\u8fbe\u5f0f\u6216 lambda \u51fd\u6570\n -s SELECT, --select SELECT\n \u5bf9\u8def\u5f84\u8fdb\u884c\u7b5b\u9009\uff0c\u63d0\u4f9b\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff08\u4f1a\u6ce8\u5165\u4e00\u4e2a\u53d8\u91cf path\uff0c\u7c7b\u578b\u662f pathlib.Path\uff09\u6216\u51fd\u6570\uff08\u4f1a\u4f20\u5165\u4e00\u4e2a\u53c2\u6570\uff0c\u7c7b\u578b\u662f pathlib.Path\uff09\n -se, --select-exec \u5bf9 -s/--select \u4f20\u5165\u7684\u4ee3\u7801\u7528 exec \u8fd0\u884c\uff0c\u5176\u4e2d\u5fc5\u987b\u5b58\u5728\u540d\u4e3a select \u7684\u51fd\u6570\u3002\u5426\u5219\uff0c\u89c6\u4e3a\u8868\u8fbe\u5f0f\u6216 lambda \u51fd\u6570\n -o OUTPUT_FILE, --output-file OUTPUT_FILE\n \u4fdd\u5b58\u5230\u6587\u4ef6\uff0c\u6b64\u65f6\u547d\u4ee4\u884c\u4f1a\u8f93\u51fa\u8fdb\u5ea6\u6761\n -hs [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...], --hashes [{sha256,sha3_512,sha1,sha512_256,md5,ripemd160,sha512,md5-sha1,sha3_256,sha384,sha3_384,sha512_224,sha224,sm3,shake_128,blake2s,sha3_224,blake2b,shake_256,crc32} ...]\n \u8ba1\u7b97\u6587\u4ef6\u7684\u54c8\u5e0c\u503c\uff0c\u53ef\u4ee5\u9009\u62e9\u591a\u4e2a\u7b97\u6cd5\n -dfs, --depth-first \u4f7f\u7528\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff0c\u5426\u5219\u4f7f\u7528\u5e7f\u5ea6\u4f18\u5148\n -fl, --follow-symlinks\n \u8ddf\u8fdb\u7b26\u53f7\u8fde\u63a5\uff0c\u5426\u5219\u4f1a\u628a\u7b26\u53f7\u94fe\u63a5\u89c6\u4e3a\u6587\u4ef6\uff0c\u5373\u4f7f\u5b83\u6307\u5411\u76ee\u5f55\n -v, --version \u8f93\u51fa\u7248\u672c\n```\n",
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