import errno
import os
raise FileNotFoundError(
errno.ENOENT, os.strerror(errno.ENOENT), filename)
Here is what the above code is Doing:
1. It’s raising a FileNotFoundError exception.
2. It’s passing three arguments to the exception:
errno.ENOENT
os.strerror(errno.ENOENT)
filename
3. The first argument is an error number.
4. The second argument is a string error message.
5. The third argument is a filename.
import pandas as pd # You don’t need these two lines # as you already have your DataFrame in memory df = pd.read_csv(“nor.txt”, sep=”|”) df.drop(df.columns[-1], axis=1) # Get column names cols = df.columns # Create a new DataFrame with just the markdown # strings df2 = pd.DataFrame([[‘—‘,]*len(cols)], columns=cols) #Create a new concatenated DataFrame df3 =…
import numpy as np a = np.array([[6,2,-5], [3,3,-2], [7,5,-3]]) b = np.array([13,13,26]) x = np.linalg.solve(a, b) print(x) Here is what the above code is Doing: 1. Create a 3×3 matrix called a. 2. Create a 1×3 matrix called b. 3. Solve the system of equations a*x = b. 4. Print the solution.
>>> pd.date_range(start=’1/1/2018′, periods=5, freq=’3M’) DatetimeIndex([‘2018-01-31’, ‘2018-04-30’, ‘2018-07-31’, ‘2018-10-31’, ‘2019-01-31′], dtype=’datetime64[ns]’, freq=’3M’) Here is what the above code is Doing: 1. start=’1/1/2018′ – We’re telling Pandas to start the range at January 1st, 2018. 2. periods=5 – We’re telling Pandas to create 5 periods. 3. freq=’3M’ – We’re telling Pandas to create periods at an interval…
>>> SubCategory._meta.get_field(‘category’).remote_field.model.__name__ >>> ‘Category’ Here is what the above code is Doing: 1. We’re getting the SubCategory model. 2. We’re getting the category field from the SubCategory model. 3. We’re getting the remote_field from the category field. 4. We’re getting the model from the remote_field. 5. We’re getting the name of the model.
from tensorflow.python.client import device_lib def get_available_gpus(): local_device_protos = device_lib.list_local_devices() return [x.name for x in local_device_protos if x.device_type == ‘GPU’] Here is what the above code is Doing: 1. import the device_lib library 2. define a function that will list all the available GPUs 3. call the function
import time import sys def scroll_text(text): for char in str(text): sys.stdout.write(char) sys.stdout.flush() time.sleep(0.05) scroll_text(“Hello World”) Here is what the above code is Doing: 1. It’s defining a function called scroll_text. 2. It’s taking a parameter called text. 3. It’s looping through each character in the text parameter. 4. It’s printing each character. 5. It’s flushing…