import?os
import?numpy?as?np
import?tensorflow?as?tf
import?h5py
import?math

def?load_dataset（）:
????train_dataset?=?h5py.File（‘datasets/train_signs.h5‘?“r“）
????train_set_x_orig?=?np.array（train_dataset[“train_set_x“][:]）?#?your?train?set?features
????train_set_y_orig?=?np.array（train_dataset[“train_set_y“][:]）?#?your?train?set?labels
????#?print（train_set_x_orig.shape）
????#?print（train_set_y_orig.shape）
????test_dataset?=?h5py.File（‘datasets/test_signs.h5‘?“r“）
????test_set_x_orig?=?np.array（test_dataset[“test_set_x“][:]）?#?your?test?set?features
????test_set_y_orig?=?np.array（test_dataset[“test_set_y“][:]）?#?your?test?set?labels
????#?print（test_set_x_orig.shape）
????#?print（test_set_y_orig.shape）
????classes?=?np.array（test_dataset[“l(fā)ist_classes“][:]）?#?the?list?of?classes
????
????train_set_y_orig?=?train_set_y_orig.reshape（（1?train_set_y_orig.shape[0]））
????test_set_y_orig?=?test_set_y_orig.reshape（（1?test_set_y_orig.shape[0]））
????
????return?train_set_x_orig?train_set_y_orig?test_set_x_orig?test_set_y_orig?classes

#load_dataset（）
def?random_mini_batches（X?Y?mini_batch_size?=?64?seed?=?0）:
????“““
????Creates?a?list?of?random?minibatches?from?（X?Y）
????
????Arguments:
????X?--?input?data?of?shape?（input?size?number?of?examples）?（m?Hi?Wi?Ci）
????Y?--?true?“l(fā)abel“?vector?（containing?0?if?cat?1?if?non-cat）?of?shape?（1?number?of?examples）?（m?n_y）
????mini_batch_size?-?size?of?the?mini-batches?integer
????seed?--?this?is?only?for?the?purpose?of?grading?so?that?you‘re?“random?minibatches?are?the?same?as?ours.
????
????Returns:
????mini_batches?--?list?of?synchronous?（mini_batch_X?mini_batch_Y）
????“““
????
????m?=?X.shape[0]??????????????????#?number?of?training?examples
????mini_batches?=?[]
????np.random.seed（seed）
????
????#?Step?1:?Shuffle?（X?Y）
????permutation?=?list（np.random.permutation（m））
????shuffled_X?=?X[permutation:::]
????shuffled_Y?=?Y[permutation:]

????#?Step?2:?Partition?（shuffled_X?shuffled_Y）.?Minus?the?end?case.
????num_complete_minibatches?=?math.floor（m/mini_batch_size）?#?number?of?mini?batches?of?size?mini_batch_size?in?your?partitionning
????for?k?in?range（0?num_complete_minibatches）:
????????mini_batch_X?=?shuffled_X[k?*?mini_batch_size?:?k?*?mini_batch_size?+?mini_batch_size:::]
????????mini_batch_Y?=?shuffled_Y[k?*?mini_batch_size?:?k?*?mini_batch_size?+?mini_batch_size:]
????????mini_batch?=?（mini_batch_X?mini_batch_Y）
????????mini_batches.append（mini_batch）
????
????#?Handling?the?end?case?（last?mini-batch?????if?m?%?mini_batch_size?!=?0:
????????mini_batch_X?=?shuffled_X[num_complete_minibatches?*?mini_batch_size?:?m:::]
????????mini_batch_Y?=?shuffled_Y[num_complete_minibatches?*?mini_batch_size?:?m:]
????????mini_batch?=?（mini_batch_X?mini_batch_Y）
????????mini_batches.append（mini_batch）
????
????return?mini_batches


def?convert_to_one_hot（Y?C）:
????Y?=?np.eye（C）[Y.reshape（-1）].T
????return?Y


def?forward_propagation_for_predict（X?parameters）:
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-07-20?12:58??assign8\
?????文件????????8586??2018-07-20?12:58??assign8\resnet_gesture.py
?????文件?????????404??2018-07-20?08:09??assign8\test_dataset.py
?????文件????????4878??2018-05-21?11:19??assign8\resnets_utils.py
?????目錄???????????0??2018-02-11?14:56??assign8\images\
?????文件???????77517??2017-11-05?13:03??assign8\images\vanishing_grad_kiank.png
?????文件???????69787??2017-11-05?13:03??assign8\images\skip_connection_kiank.png
?????文件??????476233??2017-11-05?13:03??assign8\images\signs_data_kiank.png
?????文件???????50220??2017-11-05?13:05??assign8\images\resnet_kiank.png
?????文件??????955979??2017-11-05?13:21??assign8\images\my_image.jpg
?????文件???????43859??2017-11-05?13:04??assign8\images\idblock3_kiank.png
?????文件???????33797??2017-11-05?13:04??assign8\images\idblock2_kiank.png
?????文件???????44643??2017-11-05?13:03??assign8\images\convblock_kiank.png
?????目錄???????????0??2018-02-11?14:56??assign8\datasets\
?????文件????13281872??2017-11-05?15:46??assign8\datasets\train_signs.h5
?????文件?????1477712??2017-11-05?13:08??assign8\datasets\test_signs.h5
?????目錄???????????0??2018-05-21?11:21??assign8\__pycache__\
?????文件????????3843??2018-05-21?11:21??assign8\__pycache__\resnets_utils.cpython-35.pyc