Hanning at Numpy | python

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Hanning Window — it is a weighted cosine cone.

  Syntax:  numpy.hamming (M)  Parameters:   M:  Number of points in the output window.  Returns:  AN array 

Window with maximum value normalized to one (value one appears only if M is odd).

Code # 1 :

import numpy as np

print (np.hanning ( 12 ))

Exit:

 [0. 0.07937323 0.29229249 0.57115742 0.82743037 0.97974649 0.97974649 0.82743037 0.57115742 0.29229249 0.07937323 0.] 

Code # 2: Plotting a window plot and its frequency response (requires SciPy and matplot p>

import numpy as np

import matplotlib.pyplot as plt

from numpy.fft import fft, fftshift

window = np.hanning ( 51 )


plt.plot (window)

plt.title ( "Hann window" )

plt.ylabel ( " Amplitude & amp; quot " )

plt.xlabel ( "Sample" )


plt.show ()

Output:

For frequency:

import numpy as np

import matplotlib.pyplot as plt

from numpy.fft import fft, fftshift

window = np.hanning ( 51 )

plt.figure ()

A = fft (window, 2048 ) / 25.5

mag = np. abs (fftshift (A))

freq = np.linspace ( - 0.5 , 0.5 , len (A))

response = 20 * np.log10 (mag)

response = np.clip (response, - 100 , 100 )


plt.plot (freq, response)

plt.title ( "Frequency response of Hanning window" )

plt.ylabel ( "Magnitude [dB]" )

plt.xlabel ( "Normalized frequency [cycles per sample]" )

plt.axis ( "tight" )

plt.show ()

Output:

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Hanning at Numpy | python clip: Questions

How do I copy a string to the clipboard?

2 answers

Dancrew32 By Dancrew32

I"m trying to make a basic Windows application that builds a string out of user input and then adds it to the clipboard. How do I copy a string to the clipboard using Python?

215

Answer #1

Actually, pywin32 and ctypes seem to be an overkill for this simple task. Tkinter is a cross-platform GUI framework, which ships with Python by default and has clipboard accessing methods along with other cool stuff.

If all you need is to put some text to system clipboard, this will do it:

from Tkinter import Tk
r = Tk()
r.withdraw()
r.clipboard_clear()
r.clipboard_append("i can has clipboardz?")
r.update() # now it stays on the clipboard after the window is closed
r.destroy()

And that"s all, no need to mess around with platform-specific third-party libraries.

If you are using Python 3, replace TKinter with tkinter.

Hanning at Numpy | python clip: Questions

Python script to copy text to clipboard

2 answers

I just need a python script that copies text to the clipboard.

After the script gets executed i need the output of the text to be pasted to another source. Is it possible to write a python script that does this job?

194

Answer #1

See Pyperclip. Example (taken from Pyperclip site):

import pyperclip
pyperclip.copy("The text to be copied to the clipboard.")
spam = pyperclip.paste()

Also, see Xerox. But it appears to have more dependencies.

cos

How do I install pip on macOS or OS X?

5 answers

I spent most of the day yesterday searching for a clear answer for installing pip (package manager for Python). I can"t find a good solution.

How do I install it?

1672

Answer #1

UPDATE (Jan 2019):

easy_install has been deprecated. Please use get-pip.py instead.


Old answer:

easy_install pip

If you need admin privileges to run this, try:

sudo easy_install pip

1672

Answer #2

⚡️ TL;DR — One line solution.

All you have to do is:

sudo easy_install pip

2019: ⚠️easy_install has been deprecated. Check Method #2 below for preferred installation!

Details:

⚡️ OK, I read the solutions given above, but here"s an EASY solution to install pip.

MacOS comes with Python installed. But to make sure that you have Python installed open the terminal and run the following command.

python --version

If this command returns a version number that means Python exists. Which also means that you already have access to easy_install considering you are using macOS/OSX.

ℹ️ Now, all you have to do is run the following command.

sudo easy_install pip

After that, pip will be installed and you"ll be able to use it for installing other packages.

Let me know if you have any problems installing pip this way.

Cheers!

P.S. I ended up blogging a post about it. QuickTip: How Do I Install pip on macOS or OS X?


✅ UPDATE (Jan 2019): METHOD #2: Two line solution —

easy_install has been deprecated. Please use get-pip.py instead.

First of all download the get-pip file

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Now run this file to install pip

python get-pip.py

That should do it.

Another gif you said? Here ya go!

1672

Answer #3

You can install it through Homebrew on OS X. Why would you install Python with Homebrew?

The version of Python that ships with OS X is great for learning but it’s not good for development. The version shipped with OS X may be out of date from the official current Python release, which is considered the stable production version. (source)

Homebrew is something of a package manager for OS X. Find more details on the Homebrew page. Once Homebrew is installed, run the following to install the latest Python, Pip & Setuptools:

brew install python

We hope this article has helped you to resolve the problem. Apart from Hanning at Numpy | python, check other clip-related topics.

Want to excel in Python? See our review of the best Python online courses 2022. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Boris Nickolson

Massachussetts | 2022-12-07

I was preparing for my coding interview, thanks for clarifying this - Hanning at Numpy | python in Python is not the simplest one. Will use it in my bachelor thesis

Olivia Porretti

Paris | 2022-12-07

Thanks for explaining! I was stuck with Hanning at Numpy | python for some hours, finally got it done 🤗. Will get back tomorrow with feedback

Walter Galleotti

Rome | 2022-12-07

Simply put and clear. Thank you for sharing. Hanning at Numpy | python and other issues with cos was always my weak point 😁. I just hope that will not emerge anymore

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