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Python Articles
Page 617 of 852
Python - Find the length of the last word in a string
When it is required to find the length of the last word in a string, a method is defined that removes the extra empty spaces in a string, and iterates through the string. It iterates until the last word has been found. Then, its length is found and returned as output.ExampleBelow is a demonstration of the samedef last_word_length(my_string): init_val = 0 processed_str = my_string.strip() for i in range(len(processed_str)): if processed_str[i] == " ": init_val ...
Read MorePython Program to accept string starting with vowel
When it is required to accept a string that starts with a vowel, a ‘startswith’ function is used to check if the string begins with a specific character (vowel) or not.ExampleBelow is a demonstration of the samemy_list = ["Hi", "there", "how", "are", "u", "doing"] print("The list is : ") print(my_list) my_result = [] vowel = "aeiou" for sub in my_list: flag = False for letter in vowel: if sub.startswith(letter): flag = True ...
Read MorePython - Find words greater than given length
When it is required to find words that are greater than a specific length, a method is defined that splits the string, and iterates through it. It checks the length of the word and compares it with the given length. If they match, it is returned as output.ExampleBelow is a demonstration of the samedef string_check(string_length, my_string): result_string = [] words = my_string.split(" ") for x in words: if len(x) > string_length: result_string.append(x) return result_string string_length = 3 my_string ="Python is always fun to learn" print("The string is :") ...
Read MorePython Program to check if String contains only Defined Characters using Regex
When it is required to check if a given string contains specific characters using regular expression, a regular expression pattern is defined, and the string is subjected to follow this pattern.ExampleBelow is a demonstration of the sameimport re def check_string(my_string, regex_pattern): if re.search(regex_pattern, my_string): print("The string contains the defined characters only") else: print("The doesnot string contain the defined characters") regex_pattern = re.compile('^[Python]+$') my_string_1 = 'Python' print("The string is :") print(my_string_1) check_string(my_string_1 , regex_pattern) my_string_2 = 'PythonInterpreter' print("The string ...
Read MorePython Program to accept string ending with alphanumeric character
When it is required to check if a string ends with an alphanumeric character or not, the regular expression is used. A method is defined that checks to see an alphanumeric characters, and returns the string as output.ExampleBelow is a demonstration of the sameimport re regex_expression = '[a-zA-z0-9]$' def check_string(my_string): if(re.search(regex_expression, my_string)): print("The string ends with alphanumeric character") else: print("The string doesnot end with alphanumeric character") my_string_1 = "Python@" print("The string is :") print(my_string_1) check_string(my_string_1) ...
Read MorePython - Check whether a string starts and ends with the same character or not
When it is required to check if a string begins and ends with the same character or not, regular expression can be used. A method can be defined that uses the ‘search’ function to see if a string begins and ends with a specific character.ExampleBelow is a demonstration of the sameimport re regex_expression = r'^[a-z]$|^([a-z]).*\1$' def check_string(my_string): if(re.search(regex_expression, my_string)): print("The given string starts and ends with the same character") else: print("The given string doesnot start and end with the ...
Read MoreHow to make a rug plot in Matplotlib?
Rug plots are used to visualize the distribution of data. It is a plot of data for a single variable, displayed as marks along an axis. To make a rug plot in Matplotlib, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create x data points using numpy.Add representation of a kernel-density estimate using Gaussian kernels, kde1 and kde2.Create a new figure or activate an existing figure using figure() method.Add an 'ax1' to the figure as part of a subplot arrangement.Make a rug plot with marker_size=20.Plot x_eval, kde1(x_eval) and kde2(x_eval) data ...
Read MorePython regex to find sequences of one upper case letter followed by lower case letters
When it is required to find sequences of an upper case letter followed by lower case using regular expression, a method named ‘match_string’ is defined that uses the ‘search’ method to match a regular expression. Outside the method, the string is defined, and the method is called on it by passing the string.ExampleBelow is a demonstration of the sameimport re def match_string(my_string): pattern = '[A-Z]+[a-z]+$' if re.search(pattern, my_string): return('The string meets the required condition ') else: return('The string doesnot meet the required condition ') print("The string is ...
Read MorePython - Remove all characters except letters and numbers
When it is required to remove all characters except for letters and numbers, regular expressions are used. A regular expression is defined, and the string is subjected to follow this expression.ExampleBelow is a demonstration of the sameimport re my_string = "python123:, .@! abc" print ("The string is : ") print(my_string) result = re.sub('[\W_]+', '', my_string) print ("The expected string is :") print(result)OutputThe string is : python123:, .@! abc The expected string is : python123abcExplanationThe required packages are imported.A string is defined and is displayed on the console.A regular expression is defined, and the string is subjected ...
Read MoreHow to fill rainbow color under a curve in Python Matplotlib?
To fill rainbow color under a curve in Python Matplotlib, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create a user-defined method, plot_rainbow_under_curve(), that could have a list of 7 rainbow colors and create a set of data points "x" using numpy.Iterate in the range of 0 to 7 and plot the curve and fill the area between that curve.To display the figure, use show() method.Exampleimport numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True def plot_rainbow_under_curve(): rainbow_colors = ['violet', 'indigo', ...
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