Today I Learned

Python Onliner: Filter Prime Numbers

Here is some one-liner from Linghao:一行 Python 能实现什么丧心病狂的功能？，

• Find out prime numbers using filter(lambda x: all(map(lambda p: x % p != 0, range(2, x))), range(2, n))
• Read csw file: with open('t.csv', 'r') as f: rows = [line.strip().split(',') for line in f.readlines()]
• Transpose a matrix m = [ [1,2],[3,4]] zip(*m)