Python NumPy - Practice Exercises, Questions, and Solutions Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Python NumPy is a general-purpose array processing package. It provides fast and versatile n-dimensional arrays and tools for working with these arrays. It provides various computing tools such as comprehensive mathematical functions, random number generator and it's easy to use syntax makes it highly accessible and productive for programmers from any background. This NumPy exercise will help the learners to get a better understanding of NumPy arrays. This practice page consists of a huge set of NumPy programs like NumPy array, Matrix, handling indexing in NumPy, working with Mathematics. Statistics and all sort of frequently encountered problems. Questions on NumPy ArrayHow to create an empty and a full NumPy array?Create a Numpy array filled with all zerosCreate a Numpy array filled with all onesCheck whether a Numpy array contains a specified rowHow to Remove rows in Numpy array that contains non-numeric values?Remove single-dimensional entries from the shape of an arrayFind the number of occurrences of a sequence in a NumPy arrayFind the most frequent value in a NumPy arrayCombining a one and a two-dimensional NumPy ArrayHow to build an array of all combinations of two NumPy arrays?How to add a border around a NumPy array?How to compare two NumPy arrays?How to check whether specified values are present in NumPy array?How to get all 2D diagonals of a 3D NumPy array?Flatten a Matrix in Python using NumPyFlatten a 2d numpy array into 1d arrayMove axes of an array to new positionsInterchange two axes of an arrayNumPy – Fibonacci Series using Binet FormulaCounts the number of non-zero values in the arrayCount the number of elements along a given axisTrim the leading and/or trailing zeros from a 1-D arrayChange data type of given numpy arrayReverse a numpy arrayHow to make a NumPy array read-only?Questions on NumPy MatrixGet the maximum value from given matrixGet the minimum value from given matrixFind the number of rows and columns of a given matrix using NumPySelect the elements from a given matrixFind the sum of values in a matrixCalculate the sum of the diagonal elements of a NumPy arrayAdding and Subtracting Matrices in PythonWays to add row/columns in numpy arrayMatrix Multiplication in NumPyGet the eigen values of a matrixHow to Calculate the determinant of a matrix using NumPy?How to inverse a matrix using NumPyHow to count the frequency of unique values in NumPy array?Multiply matrices of complex numbers using NumPy in PythonCompute the outer product of two given vectors using NumPy in PythonCalculate inner, outer, and cross products of matrices and vectors using NumPyCompute the covariance matrix of two given NumPy arraysConvert covariance matrix to correlation matrix using PythonCompute the Kronecker product of two mulitdimension NumPy arraysConvert the matrix into a listQuestions on NumPy IndexingReplace NumPy array elements that doesn’t satisfy the given conditionReturn the indices of elements where the given condition is satisfiedReplace NaN values with average of columnsReplace negative value with zero in numpy arrayHow to get values of an NumPy array at certain index positions?Find indices of elements equal to zero in a NumPy arrayHow to Remove columns in Numpy array that contains non-numeric values?How to access different rows of a multidimensional NumPy array?Get row numbers of NumPy array having element larger than XGet filled the diagonals of NumPy arrayCheck elements present in the NumPy arrayCombined array index by indexQuestions on NumPy Linear AlgebraFind a matrix or vector norm using NumPyCalculate the QR decomposition of a given matrix using NumPyCompute the condition number of a given matrix using NumPyCompute the eigenvalues and right eigenvectors of a given square array using NumPy?Calculate the Euclidean distance using NumPyQuestions on NumPy RandomCreate a Numpy array with random valuesHow to choose elements from the list with different probability using NumPy?How to get weighted random choice in Python?Generate Random Numbers From The Uniform Distribution using NumPyGet Random Elements form geometric distributionGet Random elements from Laplace distributionReturn a Matrix of random values from a uniform distributionReturn a Matrix of random values from a Gaussian distributionQuestions on NumPy Sorting and SearchingHow to get the indices of the sorted array using NumPy in Python?Finding the k smallest values of a NumPy arrayHow to get the n-largest values of an array using NumPy?Sort the values in a matrixFilter out integers from float numpy arrayFind the indices into a sorted arrayQuestions on NumPy MathematicsHow to get element-wise true division of an array using Numpy?How to calculate the element-wise absolute value of NumPy array?Compute the negative of the NumPy arrayMultiply 2d numpy array corresponding to 1d arrayComputes the inner product of two arraysCompute the nth percentile of the NumPy arrayCalculate the n-th order discrete difference along the given axisCalculate the sum of all columns in a 2D NumPy arrayCalculate average values of two given NumPy arraysHow to compute numerical negative value for all elements in a given NumPy array?How to get the floor, ceiling and truncated values of the elements of a numpy array?How to round elements of the NumPy array to the nearest integer?Find the round off the values of the given matrixDetermine the positive square-root of an arrayEvaluate Einstein’s summation convention of two multidimensional NumPy arraysQuestions on NumPy StatisticsCompute the median of the flattened NumPy arrayFind Mean of a List of Numpy ArrayCalculate the mean of array ignoring the NaN valueGet the mean value from given matrixCompute the variance of the NumPy arrayCompute the standard deviation of the NumPy arrayCompute pearson product-moment correlation coefficients of two given NumPy arraysCalculate the mean across dimension in a 2D NumPy arrayCalculate the average, variance and standard deviation in Python using NumPyDescribe a NumPy Array in PythonQuestions on PolynomialDefine a polynomial functionHow to add one polynomial to another using NumPy in Python?How to subtract one polynomial to another using NumPy in Python?How to multiply a polynomial to another using NumPy in Python?How to divide a polynomial to another using NumPy in Python?Find the roots of the polynomials using NumPyEvaluate a 2-D polynomial series on the Cartesian productEvaluate a 3-D polynomial series on the Cartesian productQuestions on NumPy StringsRepeat all the elements of a NumPy array of stringsHow to split the element of a given NumPy array with spaces?How to insert a space between characters of all the elements of a given NumPy array?Find the length of each string element in the Numpy arraySwap the case of an array of stringChange the case to uppercase of elements of an arrayChange the case to lowercase of elements of an arrayJoin String by a separatorCheck if two same shaped string arrayss one by oneCount the number of substrings in an arrayFind the lowest index of the substring in an arrayGet the boolean array when values end with a particular characterMore Questions on NumPyDifferent ways to convert a Python dictionary to a NumPy arrayHow to convert a list and tuple into NumPy arrays?Ways to convert array of strings to array of floatsConvert a NumPy array into a csv fileHow to Convert an image to NumPy array and save it to CSV file using Python?How to save a NumPy array to a text file?Load data from a text filePlot line graph from NumPy arrayCreate Histogram using NumPy Comment More infoAdvertise with us Next Article Python Introduction A 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