Python Articles - Page 603 of 1048

Python is well known for its huge library of packages. With the help of libraries, we will see how to convert a PDF to a CSV file. A CSV file is nothing but a collection of data, framed along with a set of rows and columns. There are various packages available in the Python library to convert PDF to CSV, but we will use the Tabula-py module. The major part of tabula-py is written in Java that first reads the PDF document and converts the Python DataFrame into a JSON object.In order to work with tabula-py, we must have Java ... Read More

Python is a scripting language and thus, it helps in many ways to create file converters such as CSV to PDF, PDF to DOC, and vice-versa. With the help of certain libraries, we can also create an application that converts images into PDF. To create such an application, we use the img2pdf module in Python. It helps to parse the image binary and converts it into PDFs.We will follow these steps to create an application, First, make sure the system has img2pdf requirements already in place. Type pip install img2pdf on your terminal to install the package. Import img2pdf in ... Read More

Ttk adds styles to the tkinter’s standard widget which can be configured through different properties and functions. We can change the height of the ttk button by using the grid(options) method. This method contains various attributes and properties with some different options. If we want to resize the ttk button, we can specify the value of internal padding such as ipadx and ipady.ExampleLet us understand it with an example, #Import tkinter library from tkinter import * from tkinter import ttk #Create an instance of tkinter frame or window win = Tk() #Set the geometry of tkinter frame win.geometry("750x250") #Create a ... Read More

When it is required solve the maximum subarray problem using the divide and conquer method, Below is the demonstration of the same −Example Live Demodef max_crossing_sum(my_array, low, mid, high):    sum_elements = 0    sum_left_elements = -10000    for i in range(mid, low-1, -1):    sum_elements = sum_elements + my_array[i]    if (sum_elements > sum_left_elements):       sum_left_elements = sum_elements    sum_elements = 0    sum_right_elements = -1000    for i in range(mid + 1, high + 1):       sum_elements = sum_elements + my_array[i]       if (sum_elements > sum_right_elements):     ... Read More

When it is required to sort a list of tuples in increasing order based on last element of every tuple, a method is defined, that iterates over the tuple and performs a simple swap to achieve the same.Below is the demonstration of the same −Example Live Demodef sort_tuple(my_tup):    my_len = len(my_tup)    for i in range(0, my_len):       for j in range(0, my_len-i-1):          if (my_tup[j][-1] > my_tup[j + 1][-1]):             temp = my_tup[j]             my_tup[j]= my_tup[j + 1]         ... Read More

When it is required to generate random numbers within a given range and append them to a list, a method is defined, that generates random numbers and ‘append’s them to an empty list.Below is the demonstration of the same −Example Live Demoimport random def random_gen(beg, end, my_num):    my_result = []    for j in range(my_num):       my_result.append(random.randint(beg, end))    return my_result my_num = 19 beg = 1 end = 20 print("The number is :") print(my_num) print("The start and end values are :") print(beg, end) print("The elements are : ") print(random_gen(beg, end, my_num))OutputThe number is : 19 The start ... Read More

When it is required to find the sum of a list where the specific element is sum of first few elements, a method is defined, that takes list as parameter. It uses list comprehension to find the cumulative sum.Below is the demonstration of the same −Example Live Demodef cumulative_sum(my_list):    cumulative_list = []    my_length = len(my_list)    cumulative_list = [sum(my_list[0:x:1]) for x in range(0, my_length+1)]    return cumulative_list[1:] my_list = [10, 20, 25, 30, 40, 50] print("The list is :") print(my_list) print("The cumulative sum is :") print (cumulative_sum(my_list))OutputThe list is : [10, 20, 25, 30, 40, 50] The cumulative ... Read More

When it is required to find all numbers in a range where there are perfect square, and sum of digits in the number is less than 10, list comprehension is used.Below is the demonstration of the same −Example Live Demolower_limit = int(input(“Enter the lower range: “)) upper_limit = int(input(“Enter the upper range: “)) my_list = [] my_list = [x for x in range(lower_limit,upper_limit+1) if (int(x**0.5))**2==x and sum(list(map(int,str(x))))

When it is required to create a list of tuple, and have the first element as the number, and the second element as the square of the element, list comprehension can be used.Below is the demonstration of the same −Example Live Demomy_list = [23, 42, 67, 89, 11, 32] print(“The list is “) print(my_list) print(“The resultant tuple is :”) my_result = [(val, pow(val, 2)) for val in my_list] print(my_result)OutputThe list is [23, 42, 67, 89, 11, 32] The resultant tuple is : [(23, 529), (42, 1764), (67, 4489), (89, 7921), (11, 121), (32, 1024)]ExplanationA list is defined, and is displayed on ... Read More

When it is required to find the second largest number in a list using bubble sort, a method named ‘bubble_sort’ is defined, that sorts the elements of the list. Once this is done, another method named ‘get_second_largest’ is defined that returns the second element from the end as output.Below is the demonstration of the same −Example Live Demomy_list = [] my_input = int(input("Enter the number of elements...")) for i in range(1, my_input+1):    b=int(input("Enter the element..."))    my_list.append(b) for i in range(0, len(my_list)):    for j in range(0, len(my_list)-i-1):       if(my_list[j]>my_list[j+1]):          temp=my_list[j]       ... Read More