pandas fillna with median of column

import numpy as np import matplotlib.pyplot as plt nstep = 300 # random signal generation a_range = [0,2] a = np.random.rand(nstep) * (a_range[1]-a_range[0]) + a_range[0] # range for amplitude b_range = [2, 10] b = np.random.rand(nstep) *(b_range[1]-b_range[0]) + b_range[0] # range for frequency b = np.round(b) b = b.astype(int) b[0] = 0 for i in…

df[‘quarter’] = df[‘date’].dt.quarter Here is what the above code is Doing: 1. We’re creating a new column called ‘quarter’ 2. We’re using the .dt accessor to access the datetime object 3. We’re using the .quarter method to get the quarter of the datetime object

#!/usr/bin/env python from beginner_tutorials.srv import AddTwoInts,AddTwoIntsResponse import rospy def handle_add_two_ints(req): print “Returning [%s + %s = %s]”%(req.a, req.b, (req.a + req.b)) return AddTwoIntsResponse(req.a + req.b) def add_two_ints_server(): rospy.init_node(‘add_two_ints_server’) s = rospy.Service(‘add_two_ints’, AddTwoInts, handle_add_two_ints) print “Ready to add two ints.” rospy.spin() if __name__ == “__main__”: add_two_ints_server() Here is what the above code is Doing: 1. The…

def funzione_decoratore(funzione_parametro): def wrapper(): “”” nome convenzionale – wrapper significa ‘incarto, confezione’ “”” print(“… codice da eseguire prima di ‘funzione_parametro’ …”) funzione_parametro() print(“… codice da eseguire dopo di ‘funzione_parametro’ …”) return wrapper def mia_funzione(): print(“Hello World!”) Here is what the above code is Doing: 1. The function funzione_decoratore() is defined. 2. The function wrapper() is…

root = Tk() #make sure that you define your Tkinter window , even though if you dont by impoerting tkinter if no Tk() window is defined it will automatically create one root.destroy() #here Tk.destroy() WILL NOT WORK Here is what the above code is Doing: 1. It’s creating a Tkinter window called root. 2. It’s…

import cv2 cap = cv2.VideoCapture(0) # Check if the webcam is opened correctly if not cap.isOpened(): raise IOError(“Cannot open webcam”) while True: ret, frame = cap.read() frame = cv2.resize(frame, None, fx=0.5, fy=0.5, interpolation=cv2.INTER_AREA) cv2.imshow(‘Input’, frame) c = cv2.waitKey(1) if c == 27: break cap.release() cv2.destroyAllWindows() Here is what the above code is Doing: 1. We…