week of the year pandas

ByAnurag batra September 22, 2022October 23, 2022

from datetime import date
df_date = pd.DataFrame([date.today()],columns  = ['today'])
print(df_date)
#### Print Output ####
#        today
#0  2019-09-07
df_date['weeknum'] = df_date.today.apply(lambda x:x.isocalendar()[1])
print(df_date)
#### Print Output ####
#        today  weeknum
#0  2019-09-07       36

Here is what the above code is Doing:
1. Create a dataframe with a single column called ‘today’
2. Create a new column called ‘weeknum’
3. Apply a lambda function to the ‘today’ column to get the week number

Python Examples

how to add to hashmap python

ByAnurag batra May 3, 2022April 14, 2022

d = {‘key’: ‘value’} print(d) # {‘key’: ‘value’} d[‘mynewkey’] = ‘mynewvalue’ print(d) # {‘key’: ‘value’, ‘mynewkey’: ‘mynewvalue’} Here is what the above code is Doing: 1. We create a dictionary with a single key-value pair. 2. We print the dictionary. 3. We add a new key-value pair to the dictionary. 4. We print the dictionary…

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print value of tensor

ByAnurag batra June 2, 2022May 20, 2022

with tf.Session() as sess: print(product.eval()) Here is what the above code is Doing: 1. We create a graph node called product. 2. We create a session. 3. Within the session, we initialize the variables. 4. We run the product node, and it returns the value of 3 * 4 = 12.

Python Examples

python : search file for string

ByAnurag batra September 25, 2022September 6, 2022

import mmap with open(‘example.txt’) as f: s = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) if s.find(‘blabla’) != -1: print(‘true’) Here is what the above code is Doing: 1. Open the file for reading. 2. Create a memory-mapped object for the entire file. 3. Search the memory-mapped object for the string ‘blabla’.

Python Examples

create iterator object python

ByAnurag batra June 20, 2022May 20, 2022

iterable = [‘Apple’, ‘Banana’, ‘Cherry’] iter(iterable) Here is what the above code is Doing: 1. We created a list of strings. 2. We created an iterator from the list. 3. We printed the iterator. The output of the code is: As you can see, the output is a list_iterator object. Now, let’s see how we…

Python Examples

pyplot new figure

ByAnurag batra October 1, 2022September 6, 2022

from matplotlib import pyplot as plt plt.figure(figsize=(15, 5)) Here is what the above code is Doing: 1. We’re creating a figure object, which is the window that contains the graph. 2. We’re setting the size of the figure to 15 inches wide and 5 inches high.

Python Examples

display 2d numpy array as image

ByAnurag batra June 6, 2022May 20, 2022

from matplotlib import pyplot as plt plt.imshow(data, interpolation=’nearest’) plt.show() Here is what the above code is Doing: 1. We’re loading the data from the MNIST dataset. 2. We’re reshaping the data into a 2D array. 3. We’re plotting the data using matplotlib. As you can see, the data is just a bunch of numbers. Each…

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