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# Multi-dimensional array example import numpy as np a = np.array([[1,2], [3,4]]) print 'Array a:' print a b = np.array([[11, 12], [13, 14]]) print 'A 阅读全文
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x = x + y x += y The two expressions have the same effect, but in the first case, x is reassigned to a new array, while in the second case, the values 阅读全文
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Errors: RuntimeError: main thread is not in main loopTcl_AsyncDelete: async handler deleted by the wrong thread Solution: import matplotlib as mplmpl. 阅读全文
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要上传文件，form必须要加enctype=multipart/form-data属性。 from flask_wtf.file import FileField class MyForm(FlaskForm): image = FileField('Upload Image:') from wer 阅读全文
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jinja2.exceptions.TemplateSyntaxError: Encountered unknown tag 'break' To use {% break %} and {% continue %}, you need to add the following jinja2 ext 阅读全文
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>>> from base64 import b64encode>>> from os import urandom>>> b64encode(urandom(32)).decode('utf-8')'2owZqn8Qo0+3yqfvzvISq98/gB3OS3BWl3DJFBPsLgQ='>>> 阅读全文
