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#coding=utf-8
'''
Created on 2016年9月27日
@author: dengdan
Tool functions for file system operation and I/O.
In the style of linux shell commands
'''
import os
import pickle as pkl
# import commands
import logging
# import util
def mkdir(path):
"""
If the target directory does not exists, it and its parent directories will created.
"""
path = get_absolute_path(path)
if not exists(path):
os.makedirs(path)
return path
def make_parent_dir(path):
"""make the parent directories for a file."""
parent_dir = get_dir(path)
mkdir(parent_dir)
def pwd():
return os.getcwd()
def dump(path, obj):
path = get_absolute_path(path)
parent_path = get_dir(path)
mkdir(parent_path)
with open(path, 'w') as f:
logging.info('dumping file:' + path);
pkl.dump(obj, f)
def load(path):
path = get_absolute_path(path)
with open(path, 'r') as f:
data = pkl.load(f)
return data
def join_path(a, *p):
return os.path.join(a, *p)
def is_dir(path):
path = get_absolute_path(path)
return os.path.isdir(path)
def is_path(path):
path = get_absolute_path(path)
return os.path.ispath(path)
def get_dir(path):
'''
return the directory it belongs to.
if path is a directory itself, itself will be return
'''
path = get_absolute_path(path)
if is_dir(path):
return path;
return os.path.split(path)[0]
def get_filename(path):
return os.path.split(path)[1]
def get_absolute_path(p):
if p.startswith('~'):
p = os.path.expanduser(p)
return os.path.abspath(p)
def cd(p):
p = get_absolute_path(p)
os.chdir(p)
# def ls(path = '.', suffix = None):
# """
# list files in a directory.
# return file names in a list
# """
# path = get_absolute_path(path)
# files = os.listdir(path)
#
# if suffix is None:
# return files
#
# filtered = []
# for f in files:
# if util.str.ends_with(f, suffix, ignore_case = True):
# filtered.append(f)
#
# return filtered
def find_files(pattern):
import glob
return glob.glob(pattern)
def read_lines(p):
"""return the text in a file in lines as a list """
p = get_absolute_path(p)
f = open(p,'r')
return f.readlines()
def write_lines(p, lines):
p = get_absolute_path(p)
make_parent_dir(p)
with open(p, 'w') as f:
for line in lines:
f.write(line)
# def cat(p):
# """return the text in a file as a whole"""
# cmd = 'cat ' + p
# return commands.getoutput(cmd)
def exists(path):
path = get_absolute_path(path)
return os.path.exists(path)
def load_mat(path):
import scipy.io as sio
path = get_absolute_path(path)
return sio.loadmat(path)
def dump_mat(path, dict_obj, append = True):
import scipy.io as sio
path = get_absolute_path(path)
make_parent_dir(path)
sio.savemat(file_name = path, mdict = dict_obj, appendmat = append)
def dir_mat(path):
'''
list the variables in mat file.
return a list: [(name, shape, dtype), ...]
'''
import scipy.io as sio
path = get_absolute_path(path)
return sio.whosmat(path)
SIZE_UNIT_K = 1024
SIZE_UNIT_M = SIZE_UNIT_K ** 2
SIZE_UNIT_G = SIZE_UNIT_K ** 3
def get_file_size(path, unit = SIZE_UNIT_K):
size = os.path.getsize(get_absolute_path(path))
return size * 1.0 / unit
def create_h5(path):
import h5py
path = get_absolute_path(path)
make_parent_dir(path)
return h5py.File(path, 'w');
def open_h5(path, mode = 'r'):
import h5py
path = get_absolute_path(path)
return h5py.File(path, mode);
def read_h5(h5, key):
return h5[key][:]
def read_h5_attrs(h5, key, attrs):
return h5[key].attrs[attrs]
def copy(src, dest):
import shutil
shutil.copy(get_absolute_path(src), get_absolute_path(dest))
cp = copy
def remove(p):
import os
os.remove(get_absolute_path(p))
rm = remove
# def search(pattern, path, file_only = True):
# """
# Search files whose name matches the give pattern. The search scope
# is the directory and sub-directories of 'path'.
# """
# path = get_absolute_path(path)
# pattern_here = util.io.join_path(path, pattern)
# targets = []
#
# # find matchings in current directory
# candidates = find_files(pattern_here)
# for can in candidates:
# if util.io.is_dir(can) and file_only:
# continue
# else:
# targets.append(can)
#
# # find matching in sub-dirs
# files = ls(path)
# for f in files:
# fpath = util.io.join_path(path, f)
# if is_dir(fpath):
# targets_in_sub_dir = search(pattern, fpath, file_only)
# targets.extend(targets_in_sub_dir)
# return targets
def dump_json(path, data):
import json
path = get_absolute_path(path)
make_parent_dir(path)
with open(path, 'w') as f:
json.dump(data, f)
return path |