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Module: heapq

on November 05, 2019

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import heapq

heapq.heapify(listName)

Push element into heap
heapq.heappush(listName,element)

Remove and get smallest element
smallest=heapq.heappop(listName)

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Check ping connectivity to multiple host

Step 1: Create a file with name "ipFile" and insert all the IP's line by line Step 2: Create a file checkConnectivity.py with below code import os import sys with open('output','w+') as o: o.write("Check hostname is accessible or not from file ipFile\n") with open('ipFile',mode='r') as f: for line in f: hostname=line #and then check the response... with open('output','a+') as out: response = os.system("ping -w 2 -c 2 " + hostname) if response == 0: out.write(hostname.split()[0] + " is accessible\n") else: out.write(hostname.split()[0] + " is not accessible\n") Step 3: Run above file using command : python checkConnectivity.py Step 4 : A new file with name "output" will be created with the details

Notes

How to get the directory of current project? workpath = os.path.dirname(os.path.abspath(__file__)) __file__ will give your filename abspath will give : /path/to/your/file/filename.py #itertools How to print the cartesian product of two lists: list-a and list-b? print(*itertools.product(a,b)) How to print permutations of given list? itertools.permutations(iterableList[,r]) Combinations are emitted in lexicographic sorted order. So if the input iterable is sorted, the combination tuples will be produced in sorted order. itertools.combinations(iterableList,r) Permutations : Order matters Combinations : Order doesn't matters How can we repeat a number say 2 times in combinations? itertools.combinations_with_replacement(iterableList,repeatTimes) How to print the count of consecutive occurence of element? print(*[(len(list(c)), int(k)) for k, c in itertools.groupby(input())]) Example: Input: 1222311 Output : (1, 1) (3, 2) (1, 3) (2, 1) Explain : One 1...

Sort on the basis of particular column

li=[(1, 0.23),(78, 0.39),(5, 0.27)] print sorted(li,key=lambda l:l[1], reverse=True)

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Module: heapq

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