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Pythonic way for samples #2131

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Aug 20, 2015
Merged

Pythonic way for samples #2131

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60e860b
String format is better than strcat
JulienBalestra Aug 19, 2015
807637e
Extra blank lines may be used to separate groups of related functions…
JulienBalestra Aug 19, 2015
255abcf
Whitespace before : (PEP8)
JulienBalestra Aug 19, 2015
8abecd0
Remove redundant parenthesis
JulienBalestra Aug 19, 2015
c6f7e78
String format is better than strcat
JulienBalestra Aug 19, 2015
b4f44b1
Remove useless space
JulienBalestra Aug 19, 2015
d832c81
Update ex_access.py
JulienBalestra Aug 19, 2015
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2 changes: 1 addition & 1 deletion examples/python/ex_access.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,6 @@
# Iterate through the records
cursor.reset()
for key, value in cursor:
print('Got record: ' + key + ' : ' + value)
print('Got record: %s : %s' % (key, value))

conn.close()
30 changes: 18 additions & 12 deletions examples/python/ex_stat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -32,23 +32,24 @@
import os
from wiredtiger import wiredtiger_open,WIREDTIGER_VERSION_STRING,stat


def main():
# Create a clean test directory for this run of the test program
os.system('rm -rf WT_HOME')
os.makedirs('WT_HOME')
# Connect to the database and open a session
conn = wiredtiger_open('WT_HOME', 'create,statistics=(all)')
session = conn.open_session()

# Create a simple table
session.create('table:access', 'key_format=S,value_format=S')

# Open a cursor and insert a record
cursor = session.open_cursor('table:access', None)

cursor['key'] = 'value'
cursor['key'] = 'value'
cursor.close()

session.checkpoint()
print WIREDTIGER_VERSION_STRING
print_database_stats(session)
Expand All @@ -57,46 +58,51 @@ def main():
print_derived_stats(session)
conn.close()


def print_database_stats(session):
statcursor = session.open_cursor("statistics:")
print_cursor(statcursor)
statcursor.close()


def print_file_stats(session):
fstatcursor = session.open_cursor("statistics:table:access")
print_cursor(fstatcursor)
fstatcursor.close()


def print_overflow_pages(session):
ostatcursor = session.open_cursor("statistics:table:access")
val = ostatcursor[stat.dsrc.btree_overflow]
if val != 0 :
print str(val[0]) + '=' + str(val[1])
if val != 0:
print '%s=%s' % (str(val[0]), str(val[1]))
ostatcursor.close()


def print_derived_stats(session):
dstatcursor = session.open_cursor("statistics:table:access")
ckpt_size = dstatcursor[stat.dsrc.block_checkpoint_size][1]
file_size = dstatcursor[stat.dsrc.block_size][1]
percent = 0
if file_size != 0 :
if file_size != 0:
percent = 100 * ((float(file_size) - float(ckpt_size)) / float(file_size))
print "Table is %" + str(percent) + " fragmented"
print "Table is %%%s fragmented" % str(percent)

app_insert = int(dstatcursor[stat.dsrc.cursor_insert_bytes][1])
app_remove = int(dstatcursor[stat.dsrc.cursor_remove_bytes][1])
app_update = int(dstatcursor[stat.dsrc.cursor_update_bytes][1])
fs_writes = int(dstatcursor[stat.dsrc.cache_bytes_write][1])
fs_writes = int(dstatcursor[stat.dsrc.cache_bytes_write][1])

if(app_insert + app_remove + app_update != 0):
if app_insert + app_remove + app_update != 0:
print "Write amplification is " + '{:.2f}'.format(fs_writes / (app_insert + app_remove + app_update))
dstatcursor.close()


def print_cursor(mycursor):
while mycursor.next() == 0:
val = mycursor.get_value()
if val[1] != '0' :
print str(val[0]) + '=' + str(val[1])
if val[1] != '0':
print '%s=%s' % (str(val[0]), str(val[1]))

if __name__ == "__main__":
main()
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