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def full_path(folder_path):
    full_path = []
    for dirpath, subdirs, files in os.walk(folder_path):
        for f in files:
                full_path.append(os.path.join(dirpath, f))
    return full_path

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import os
data_root = '/home/pt/Dropbox/mxnet/example/yelp/'
def load_info():
    full_path = []
    for path, dir, files in os.walk(data_root+'/train_photos'):
        for f in files:
            #path_to_image.append(f)
            #dir.append(f)
            name = os.path.join(dir, f)
            full_path.append(name)

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bid_img = defaultdict(list)
for line in train_photo_to_biz_ids:
    pid, bid2 = [v.strip() for v in line.split(',')]
    bid2 = bid2.strip("\r\n")
    bid_img[bid2].append(pid)

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unzip -c train.zip Train.csv | less

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echo "alias aliasname='command'" >> ~/.bash_aliases && source ~/.bash_aliases

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def convert_label_to_array(str_label):
    str_label = str_label[1:-1]
    str_label = str_label.split(',')
    return [int(x) for x in str_label if len(x)>0]

def convert_feature_to_vector(str_feature):
    str_feature = str_feature[1:-1]
    str_feature = str_feature.split(',')
    return [float(x) for x in str_feature]

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#List unique values in a DataFrame column
pd.unique(df.column_name.ravel())

#Convert Series datatype to numeric, getting rid of any non-numeric values
df['col'] = df['col'].astype(str).convert_objects(convert_numeric=True)

#Grab DataFrame rows where column has certain values
valuelist = ['value1', 'value2', 'value3']
df = df[df.column.isin(value_list)]

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def mf(y_true, y_pred):
    tp = 0
    fp = 0
    fn = 0
    for i in range(y_true.shape[0]):
        for j in range(y_true.shape[1]):
            if y_true[i, j] == y_pred[i, j]:
                if y_true[i,j] == 1:
                    tp += 1
            elif y_true[i, j] != y_pred[i, j]:

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def mf(y_true, y_pred):
    tp = 0.0
    fp = 0.0
    fn = 0.0
    for i in range(y_true.shape[0]):
        for j in range(y_true.shape[1]):
            if y_true[i, j] == y_pred[i, j] & y_true[i,j] == 1:
                    tp += 1
            elif y_true[i, j] != y_pred[i, j]:
                if y_pred[i,j] == 1:

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from_dir = from_dir if from_dir.endswith('/') else from_dir + '/'