Rearrange the code, all necessary code is already listed Given a particular list of prerequisite requirements, the functionwiz_study_length(prereq_list, final='WIZ90001') isintended to calculate the minimum number of semesters it will takeSandy to graduate. The arguments are:• prereq_list, a list of (subject, prerequisite) tuples specifyingthat prerequisite must be completed before enrolling insubject. Note that a subject may have more than oneprerequisite.• final, the target subject to complete, with a default value of"WIZ90001'.Any subject that appears as a prerequisite in a prereq_list tuplebut does not appear as a subject can be assumed to have noprerequisites. Furthermore, we assume that Sandy has capacity totake as many subjects as required each semester, as long as theyhave completed their prerequisites.For example: wiz_study_length([ ('WIZ90001', 'WIZ40027'), ('WIZ9E2Here, both WIZ40027 and WIZ20003 are prerequisites ofWIZ90001, and so must be completed before studying WIZ90001.Neither of these two subjects have any prerequisites. Therefore itwill take two semesters of study for Sandy to graduate. wiz_study_length([('WIZ90001', 'WIZ40027'), ('WIZ9E('WIZ40027', 'WIZ30015'), ('WIZ2E('WIZ20003', 'WIZ10015'), ('WIZ26In this case, it will take 4 semesters for Sandy graduate, due to theprerequisite chain: WIZ10001 - WIZ20001 - WIZ20003 -WIZ90001. while cur prereqs:prereqs [subject[0]].append (subject[1])semesters = 0; cur_prereqs = [final]for subject in prereq_list:from collections import defaultdictreturn semestersdef wiz_study_length (prereq_list, final='WIZ90001'):new_prereqs = ()for subject in cur_prereqs:if subject in prereqs:prereqs = defaultdict(list)new_prereqs += prereqs(subject]cur prereqs = new_prereqs; semesters += 1

Question

Rearrange the code, all necessary code is already listed Given a particular list of prerequisite requirements, the functionwiz_study_length(prereq_list, final='WIZ90001') isintended to calculate the minimum number of semesters it will takeSandy to graduate. The arguments are:• prereq_list, a list of (subject, prerequisite) tuples specifyingthat prerequisite must be completed before enrolling insubject. Note that a subject may have more than oneprerequisite.• final, the target subject to complete, with a default value of&#34;WIZ90001'.Any subject that appears as a prerequisite in a prereq_list tuplebut does not appear as a subject can be assumed to have noprerequisites. Furthermore, we assume that Sandy has capacity totake as many subjects as required each semester, as long as theyhave completed their prerequisites.For example:>>> wiz_study_length([ ('WIZ90001', 'WIZ40027'), ('WIZ9E2Here, both WIZ40027 and WIZ20003 are prerequisites ofWIZ90001, and so must be completed before studying WIZ90001.Neither of these two subjects have any prerequisites. Therefore itwill take two semesters of study for Sandy to graduate.>>> wiz_study_length([('WIZ90001', 'WIZ40027'), ('WIZ9E('WIZ40027', 'WIZ30015'), ('WIZ2E('WIZ20003', 'WIZ10015'), ('WIZ26In this case, it will take 4 semesters for Sandy graduate, due to theprerequisite chain: WIZ10001 -> WIZ20001 -> WIZ20003 ->WIZ90001. while cur prereqs:prereqs [subject[0]].append (subject[1])semesters = 0; cur_prereqs = [final]for subject in prereq_list:from collections import defaultdictreturn semestersdef wiz_study_length (prereq_list, final='WIZ90001'):new_prereqs = ()for subject in cur_prereqs:if subject in prereqs:prereqs = defaultdict(list)new_prereqs += prereqs(subject]cur prereqs = new_prereqs; semesters += 1

Accepted Answer

from _collections import defaultdictdef wiz_study_length(prereq_list,final = 'WIZ90001'):…