Transposing a 1D NumPy array

It’s working exactly as it’s supposed to. The transpose of a 1D array is still a 1D array! (If you’re used to matlab, it fundamentally doesn’t have a concept of a 1D array. Matlab’s “1D” arrays are 2D.) If you want to turn your 1D vector into a 2D array and then transpose it, just slice it with np.newaxis (or None, they’re … Read more

Python code to remove HTML tags from a string 

Using a regex Using a regex, you can clean everything inside <> : Some HTML texts can also contain entities that are not enclosed in brackets, such as ‘&nsbm‘. If that is the case, then you might want to write the regex as This link contains more details on this. Using BeautifulSoup You could also use BeautifulSoup additional package to find … Read more

IOError: [Errno 32] Broken pipe when piping: `prog.py | othercmd`

I haven’t reproduced the issue, but perhaps this method would solve it: (writing line by line to stdout rather than using print) You could catch the broken pipe? This writes the file to stdout line by line until the pipe is closed. You also need to make sure that othercommand is reading from the pipe before it gets too big – https://unix.stackexchange.com/questions/11946/how-big-is-the-pipe-buffer

Difference between exit(0) and exit(1) in Python

0 and 1 are the exit codes. exit(0) means a clean exit without any errors / problems exit(1) means there was some issue / error / problem and that is why the program is exiting. This is not Python specific and is pretty common. A non-zero exit code is treated as an abnormal exit, and at times, … Read more

How to implement the –verbose or -v option into a script?

My suggestion is to use a function. But rather than putting the if in the function, which you might be tempted to do, do it like this: (Yes, you can define a function in an if statement, and it’ll only get defined if the condition is true!) If you’re using Python 3, where print is already a function (or if you’re … Read more

Base language of Python

You can’t say that Python is written in some programming language, since Python as a language is just a set of rules (like syntax rules, or descriptions of standard functionality). So we might say, that it is written in English :). However, mentioned rules can be implemented in some programming language. Hence, if you send … Read more

numpy : calculate the derivative of the softmax function

I am assuming you have a 3-layer NN with W1, b1 for is associated with the linear transformation from input layer to hidden layer and W2, b2 is associated with linear transformation from hidden layer to output layer. Z1 and Z2 are the input vector to the hidden layer and output layer. a1 and a2 represents the output of the hidden layer and output layer. a2 is your predicted output. delta3 and delta2 are the … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)