FilesExpand file tree

 python-807

/

example_core.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

86 lines (68 loc) · 2.39 KB

 python-807

/

example_core.py

Copy path

Top

File metadata and controls

• Code
• Blame

86 lines (68 loc) · 2.39 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

#!/usr/bin/env python

# Copyright 2013-2017 DataStax, Inc.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import logging

log = logging.getLogger()

log.setLevel('DEBUG')

handler = logging.StreamHandler()

handler.setFormatter(logging.Formatter("%(asctime)s [%(levelname)s] %(name)s: %(message)s"))

log.addHandler(handler)

from cassandra import ConsistencyLevel

from cassandra.cluster import Cluster

from cassandra.query import SimpleStatement

KEYSPACE = "testkeyspace"

def main():

cluster = Cluster(['127.0.0.1'])

session = cluster.connect()

log.info("creating keyspace...")

session.execute("""

CREATE KEYSPACE IF NOT EXISTS %s

WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '2' }

""" % KEYSPACE)

log.info("setting keyspace...")

session.set_keyspace(KEYSPACE)

log.info("creating table...")

session.execute("""

CREATE TABLE IF NOT EXISTS mytable (

thekey text,

col1 text,

col2 text,

PRIMARY KEY (thekey, col1)

)

""")

query = SimpleStatement("""

INSERT INTO mytable (thekey, col1, col2)

VALUES (%(key)s, %(a)s, %(b)s)

""", consistency_level=ConsistencyLevel.ONE)

prepared = session.prepare("""

INSERT INTO mytable (thekey, col1, col2)

VALUES (?, ?, ?)

""")

for i in range(10):

log.info("inserting row %d" % i)

session.execute(query, dict(key="key%d" % i, a='a', b='b'))

session.execute(prepared, ("key%d" % i, 'b', 'b'))

future = session.execute_async("SELECT * FROM mytable")

log.info("key\tcol1\tcol2")

log.info("---\t----\t----")

try:

rows = future.result()

except Exception:

log.exception("Error reading rows:")

return

for row in rows:

log.info('\t'.join(row))

session.execute("DROP KEYSPACE " + KEYSPACE)

if __name__ == "__main__":

main()