install†

centos†

yum install https://centos7.iuscommunity.org/ius-release.rpm
yum install python36

windows (cygwin)†

cd /usr/bin/
wget https://raw.github.com/kou1okada/apt-cyg/master/apt-cyg
chmod +x apt-cyg
apt-cyg install python3

stdin†

#!/usr/bin/python36
import fileinput,re
for l in fileinput.input():
  line = l.rstrip()
  m = re.search('([0-9]+):' , line);
  if m :
      print( m.group(1) );

file open†

f = open(file,'r')
for l in f.readlines():
  line = l.rstrip()		
  print(line) 
f.close()

unixtime†

from datetime import datetime
d = datetime.strptime("2019-04-10 10:48:56",'%Y-%m-%d %H:%M:%S') # str -> date型
unixtime = d.timestamp()        # double型 (unixtime) 
datetime.fromtimestamp( unixtime ) # date型 
str = datetime.strftime('%Y%m%d%H%M%S')

system†

proc = subprocess.run('ls *.jpg', shell=True,stdout = subprocess.PIPE, stderr = subprocess.PIPE)
res = proc.stdout.decode("utf8").split()
for line in res:
   print(line)

sprintf†

print ("%04d-%02d-%02d" % (year , month, date))

if†

if a==b and b==c:
    pass
else:
  print "hoge\n";

snipet†

#!/usr/bin/python3
import subprocess,re,fileinput,pprint
from datetime import datetime

def system(cmd):
	proc = subprocess.run(cmd, shell=True,stdout = subprocess.PIPE, stderr = subprocess.PIPE)
	res = proc.stdout.decode("utf8").split()
	return res
# ---------------------------
res = system("ls *.jpg")
for line in res:
   print(line)

for l in fileinput.input():
 line = l.rstrip()
 if re.findall(【regex】,line):
     print(line)