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from __future__ import print_function |
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import os |
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import tarfile |
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import requests |
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from warnings import warn |
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from zipfile import ZipFile |
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from bs4 import BeautifulSoup |
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from os.path import abspath, isdir, join, basename |
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class GetData(object): |
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"""A Python script for downloading CycleGAN or pix2pix datasets. |
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Parameters: |
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technique (str) -- One of: 'cyclegan' or 'pix2pix'. |
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verbose (bool) -- If True, print additional information. |
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Examples: |
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>>> from util.get_data import GetData |
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>>> gd = GetData(technique='cyclegan') |
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>>> new_data_path = gd.get(save_path='./datasets') # options will be displayed. |
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Alternatively, You can use bash scripts: 'scripts/download_pix2pix_model.sh' |
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and 'scripts/download_cyclegan_model.sh'. |
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""" |
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def __init__(self, technique='cyclegan', verbose=True): |
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url_dict = { |
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'pix2pix': 'http://efrosgans.eecs.berkeley.edu/pix2pix/datasets/', |
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'cyclegan': 'https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets' |
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} |
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self.url = url_dict.get(technique.lower()) |
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self._verbose = verbose |
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def _print(self, text): |
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if self._verbose: |
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print(text) |
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@staticmethod |
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def _get_options(r): |
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soup = BeautifulSoup(r.text, 'lxml') |
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options = [h.text for h in soup.find_all('a', href=True) |
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if h.text.endswith(('.zip', 'tar.gz'))] |
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return options |
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def _present_options(self): |
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r = requests.get(self.url) |
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options = self._get_options(r) |
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print('Options:\n') |
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for i, o in enumerate(options): |
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print("{0}: {1}".format(i, o)) |
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choice = input("\nPlease enter the number of the " |
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"dataset above you wish to download:") |
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return options[int(choice)] |
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def _download_data(self, dataset_url, save_path): |
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if not isdir(save_path): |
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os.makedirs(save_path) |
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base = basename(dataset_url) |
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temp_save_path = join(save_path, base) |
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with open(temp_save_path, "wb") as f: |
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r = requests.get(dataset_url) |
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f.write(r.content) |
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if base.endswith('.tar.gz'): |
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obj = tarfile.open(temp_save_path) |
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elif base.endswith('.zip'): |
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obj = ZipFile(temp_save_path, 'r') |
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else: |
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raise ValueError("Unknown File Type: {0}.".format(base)) |
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self._print("Unpacking Data...") |
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obj.extractall(save_path) |
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obj.close() |
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os.remove(temp_save_path) |
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def get(self, save_path, dataset=None): |
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""" |
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Download a dataset. |
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Parameters: |
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save_path (str) -- A directory to save the data to. |
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dataset (str) -- (optional). A specific dataset to download. |
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Note: this must include the file extension. |
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If None, options will be presented for you |
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to choose from. |
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Returns: |
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save_path_full (str) -- the absolute path to the downloaded data. |
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""" |
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if dataset is None: |
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selected_dataset = self._present_options() |
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else: |
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selected_dataset = dataset |
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save_path_full = join(save_path, selected_dataset.split('.')[0]) |
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if isdir(save_path_full): |
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warn("\n'{0}' already exists. Voiding Download.".format( |
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save_path_full)) |
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else: |
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self._print('Downloading Data...') |
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url = "{0}/{1}".format(self.url, selected_dataset) |
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self._download_data(url, save_path=save_path) |
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return abspath(save_path_full) |
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