Some Samples of Human

This post enlists how some of the programs look like in Human.

Example 1

Human

File a.txt contains three comma separated fields: username, first name and last name. 
File b.txt also contains three comma seperated fields: email, first name and last name. 
For each email in b.txt, if corresponding first name and last name are present in a.txt, 
I want to know its username.

Python

import sys

name_2_uids = {}
f = open('a.txt')
for line in f:
    uid, first_name, last_name = line.strip().split(',')
    uid = uid.strip()
    first_name = first_name.strip()
    last_name = last_name.strip()
    name_2_uids.setdefault((first_name, last_name), []).append(uid)
f.close()

f = open('b.txt')
name_2_email = {}
for line in f:
    email, first_name, last_name = line.strip().split(',')
    email = email.strip()
    first_name = first_name.strip()
    last_name = last_name.strip()
    if (first_name, last_name) in name_2_uids:
        print first_name.encode('utf-8') + '\t' + last_name.encode('utf-8') + '\t' + ','.join(name_2_uids[(first_name, last_name)])
f.close()

Example 2

Human

Read an integer from stdin. Output YES if the integer is even but not 2. Output NO otherwise.

Python

import sys

line = sys.stdin.read().strip()
if int(line) % 2 == 0 and int(line) != 2:
    print 'YES'
else:
    print 'NO'

Example 3

Problem

Taken from Code Forces 110A

Human

Read an integer from stdin.
Count the numbers of digits in the integer which are either 4 or 7.
If all the digits of this count are either 4 or 7, output YES, else output NO.

Python

import sys

x = sys.stdin.read().strip()
count = 0
for c in x:
    if c in ('4', '7'):
        count += 1

y = str(count)
for c in y:
    if c not in ('4', '7'):
        print 'NO'
        sys.exit()
print 'YES'

Example 4

Problem

Taken from Code Forces 110A

Human

Read a sentence from the input. Replce all WUB's by whitespace. Then 
remove whitespaces from the ends and deduplicate white spaces within the sentence.

Python

import sys

sentence = sys.stdin.readline().strip()
sentence = sentence.replace('WUB', ' ').strip()
sentence = ' '.join(sentence.split())
print sentence

Example 5

Human

I have a file called user.txt, which contains userId's. 
From the events table in database 1772e3a9bb92fdc2810a_web of mongodb(hostname: 10.0.0.1, port 27010), 
find all the rows such that userId is contained in user.txt, 
eventName is page_viewed and _id is more than ObjectId("595698a80000000000000000")" 

Python

def get_user_ids(filename):
    f = open(filename)
    field_ids = []
    for line in f:
        field_ids.append(int(line.strip()))
    f.close()
    return field_ids

if __name__ == '__main__':
    client = MongoClient("10.0.0.1:27010")
    db = client['1772e3a9bb92fdc2810a_web']
    collection = db['events']
    user_ids = get_user_ids(filename)

    query = {'eventName': 'page_viewed', '_id': {'$gt': ObjectId("595698a80000000000000000")}, 'userId': {'$in': user_ids}}
    events = collection.find(query)
    for event in events:
        print event