Geekfish

def clean(self):
    if not self.cleaned_data['date_from'] and not self.cleaned_data['date_to']:
        raise forms.ValidationError(_("At least one date field is required."))
    return super(SearchByDateRangeForm, self).clean()

Geekfish

(reduce + (map #(Character/getNumericValue %) (seq (str (reduce * (range (bigint 1) (bigint 100)))))))

Geekfish

(nth (map first (iterate (fn [[a b]] [b (+ a b)]) (double-array [1 1]))) 1475)  

Geekfish

def split_per_x_chars(m, step):
    return [m[x:x+step] for x in range(0, len(m), step)]

split_per_x_chars('abcdefghijklmnop', 3)
# ['abc', 'def', 'ghi', 'jkl', 'mno', 'p']

Geekfish

from collections import defaultdict

counters = defaultdict(int)

counters['foo'] += 1
counters['foo']
# Out: 1
counters['bar']
# Out: 0

Geekfish

def most_common_problems():
    problems = (
        "People that come from PHP",
        "Coming up with variable names",
        "Off-by-one index calculations",
    )
    print "The three most common problems in programming are:"
    for x in range(1, len(problems)):
        print "* %s" % problems[x]

Geekfish

foos = [1, 2, 4, 1, 1, 5, 2, 1]

# continue
for foo in foos:
    if foo == 1:
        print "ONE"
        continue
    print foo
    
# else

Geekfish

import xmlrpclib
import pip

def check_for_updates():
    pypi = xmlrpclib.ServerProxy('http://pypi.python.org/pypi')
    for dist in pip.get_installed_distributions():
        available = pypi.package_releases(dist.project_name)
        if not available:
            # Try to capitalize pkg name
            available = pypi.package_releases(dist.project_name.capitalize())

Geekfish

{val: range(5, 0, -1)[key] for key, val in enumerate(range(1, 6))}

# {1: 5, 2: 4, 3: 3, 4: 2, 5: 1}

Geekfish

# [1] Grab all tags from remote and put them in a file removing the last 15
# Last chance to review...
git ls-remote --tags origin | awk '/^.+?\s+([^{}]+)$/ {print ":" $2}' | sed -n -e :a -e '1,15!{P;N;D;};N;ba' > remote_tags.txt

# [2] Delete remote tags
cat remote_tags.txt | xargs git push origin

# [3] Delete all local tags and refetch the ones that remain on the remote
git tag -l | xargs git tag -d
git fetch