{"kind":"task","effective_mode":"full","benchmark":{"kind":"benchmark","effective_mode":"full","slug":"ds-1000","formal_name":"DS-1000","introduction":"DS-1000 builds 1,000 data-science problems from real StackOverflow questions across seven libraries including NumPy, Pandas and Matplotlib. The problems are perturbed so that recalling the original answer does not solve them.","introduction_ja":"","introduction_en":"","category":"Category not supplied","task_count":null,"acquisition_status":"Acquisition status not supplied","official_url":"https://ds1000-code-gen.github.io/","indexing_mode":"index","profile":{"resources":[],"task_format":"","scoring":"","metric":"","size":"","answer_access":"","license":"","citation":"","maintainer":"","released":"","why_hard":"","related":[],"history":"","construction":"","limitations":"","saturation":"","scores":[]}},"task_id":"e390298e-db6a-59c8-98a7-472d29b387e6","task_key":"default--test--442","task_revision_id":"1","upstream_id":"442","short_description":"I have two arrays A (len of 3.8million) and B (len of 20k). For the minimal…","config":"default","split":"test","body":"{\"library\":\"Numpy\",\"prompt\":\"Problem:\\nI have two arrays A (len of 3.8million) and B (len of 20k). For the minimal example, lets take this case:\\nA = np.array([1,1,2,3,3,3,4,5,6,7,8,8])\\nB = np.array([1,2,8])\\nNow I want the resulting array to be:\\nC = np.array([3,3,3,4,5,6,7])\\ni.e. if any value in B is found in A, remove it from A, if not keep it.\\nI would like to know if there is any way to do it without a for loop because it is a lengthy array and so it takes long time to loop.\\nA:\\n<code>\\nimport numpy as np\\nA = np.array([1,1,2,3,3,3,4,5,6,7,8,8])\\nB = np.array([1,2,8])\\n</code>\\nC = ... # put solution in this variable\\nBEGIN SOLUTION\\n<code>\\n\"}","display_format":"code","language":"","answer_status":"published","assets":[],"source_url":"https://ds1000-code-gen.github.io/","history":"initial import","indexing_mode":"index","subproblems":[],"grids":[]}