open a python script on click flask

ByAnurag batra September 26, 2022September 6, 2022

@app.route('/run-script')
def run_script():
   result = subprocess.check_output("python main.py", shell=True)
   return render_template('results.html', **locals())

Here is what the above code is Doing:
1. We import the subprocess module.
2. We create a route called /run-script.
3. We use the subprocess.check_output() function to run the script.
4. We render the results.html template and pass the result variable to it.
5. We create a results.html template that displays the result.

Python Examples

pandas merge query “_merge=’left_only'”

ByAnurag batra September 24, 2022September 6, 2022

d = ( df1.merge(df2, on=[‘c’, ‘l’], how=’left’, indicator=True) .query(‘_merge == “left_only”‘) .drop(columns=’_merge’) ) print(d) c k l 0 A 1 a 2 B 2 a 4 C 2 d Here is what the above code is Doing: 1. Merge the two dataframes on columns ‘c’ and ‘l’ 2. Use ‘left’ join so that we keep…

Flask – store object directly in a session [duplicate]

Python Examples

Flask – store object directly in a session [duplicate]

ByAnurag batra September 26, 2022September 6, 2022

def main(): session[‘my_object’] = Test(1, 2, 3).__dict__ return redirect(‘retrieve’) Here is what the above code is Doing: 1. We create a new Test object and assign it to the session. 2. We redirect to the retrieve page. 3. We retrieve the object from the session and assign it to a variable. 4. We create a…

Python Examples

equivalent of case_when in r in pandas

ByAnurag batra September 23, 2022September 6, 2022

conditions = [ (df[“age”].lt(10)), (df[“age”].ge(10) & df[“age”].lt(20)), (df[“age”].ge(20) & df[“age”].lt(30)), (df[“age”].ge(30) & df[“age”].lt(50)), (df[“age”].ge(50)), ] choices = [“baby”, “kid”, “young”, “mature”, “grandpa”] df[“elderly”] = np.select(conditions, choices) # Results in: # name age preTestScore postTestScore elderly # 0 Jason 42 4 25 mature # 1 Molly 52 24 94 grandpa # 2 Tina 36 31 57…

Python Examples

access to specific column array numpy

ByAnurag batra October 1, 2022September 6, 2022

second_and_third_column = an_array[:, 1:3] Here is what the above code is Doing: 1. We’re selecting all rows (:) 2. We’re selecting the second and third columns (1:3) The result is a new array that contains only the second and third columns of the original array.

Python Examples

python tkinter button multiple commands

ByAnurag batra May 25, 2022May 20, 2022

button = Button(root, text=”test”, command=lambda:[funct1(),funct2()]) Here is what the above code is Doing: 1. It’s creating a button that says “test” 2. It’s creating a function that calls funct1() and funct2() 3. It’s assigning that function to the button 4. It’s displaying the button

Python Examples

cv2 reverse contrast

ByAnurag batra June 11, 2022May 20, 2022

imagem = cv2.bitwise_not(imagem) Here is what the above code is Doing: 1. We’re using the cv2.bitwise_not function to invert the image. 2. We’re using the cv2.threshold function to convert the image to a binary image. 3. We’re using the cv2.Canny function to detect the edges in the image. 4. We’re using the cv2.findContours function to…

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