Difference between revisions of "Gremlin python"
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| Line 26: | Line 26: | ||
= Installing Gremlin Server and Console = | = Installing Gremlin Server and Console = | ||
* http://tinkerpop.apache.org/downloads.html | * http://tinkerpop.apache.org/downloads.html | ||
| − | = | + | = Trial script = |
<source lang='bash'> | <source lang='bash'> | ||
#!/bin/bash | #!/bin/bash | ||
| Line 33: | Line 33: | ||
# see https://stackoverflow.com/questions/57936915/how-do-i-get-gremlin-python-with-gremlin-server-3-4-3-to-work | # see https://stackoverflow.com/questions/57936915/how-do-i-get-gremlin-python-with-gremlin-server-3-4-3-to-work | ||
| + | version=3.4.3 | ||
| + | mirror=http://mirror.dkd.de/apache/tinkerpop/$version | ||
| + | gsd=apache-tinkerpop-gremlin-server-${version} | ||
| + | gcd=apache-tinkerpop-gremlin-console-${version} | ||
# check that the given program is installed | # check that the given program is installed | ||
| − | checkinstalled() { | + | checkinstalled() { |
local l_prg="$1" | local l_prg="$1" | ||
local l_version="$2" | local l_version="$2" | ||
| Line 49: | Line 53: | ||
exit 1;; | exit 1;; | ||
esac | esac | ||
| − | fi | + | fi |
$l_prg $l_version | $l_prg $l_version | ||
} | } | ||
| − | echo "checking prerequisites ..." | + | install() { |
| − | checkinstalled java "-version" "openjdk-8-jre" | + | echo "checking prerequisites ..." |
| − | checkinstalled python "--version" "python2.7" | + | checkinstalled java "-version" "openjdk-8-jre" |
| − | checkinstalled pip "--version" "python-pip" | + | checkinstalled python "--version" "python2.7" |
| − | + | checkinstalled pip "--version" "python-pip" | |
| − | |||
| − | |||
| − | |||
| − | for d in $gsd $gcd | + | for d in $gsd $gcd |
| − | do | + | do |
| − | + | if [ ! -d $d ] | |
| − | |||
| − | |||
| − | |||
then | then | ||
| − | echo "downloading $zip" | + | zip=$d-bin.zip |
| − | + | if [ ! -f $zip ] | |
| + | then | ||
| + | echo "downloading $zip" | ||
| + | curl -s $mirror/$zip -o $zip | ||
| + | else | ||
| + | echo "$zip already downloaded" | ||
| + | fi | ||
| + | echo "unzipping $zip" | ||
| + | unzip $zip | ||
else | else | ||
| − | echo "$ | + | echo "$d already unzipped" |
fi | fi | ||
| − | + | done | |
| − | + | } | |
| − | + | ||
| − | echo "$ | + | # commandline option |
| − | + | while [ "$1" != "" ] | |
| + | do | ||
| + | option=$1 | ||
| + | shift | ||
| + | case $option in | ||
| + | -i|--install) | ||
| + | install;; | ||
| + | -s|--server) | ||
| + | echo "starting gremlin-server ..." | ||
| + | #conf=$(realpath $gsd/conf/gremlin-server-modern-py.yaml) | ||
| + | conf=$(realpath $gsd/conf/gremlin-server-modern.yaml) | ||
| + | $gsd/bin/gremlin-server.sh $conf | ||
| + | ;; | ||
| + | -c|--console) | ||
| + | echo "starting gremlin-console ..." | ||
| + | $gcd/bin/gremlin.sh | ||
| + | ;; | ||
| + | -h|--help) | ||
| + | usage;; | ||
| + | *) | ||
| + | usage;; | ||
| + | esac | ||
done | done | ||
| − | |||
| − | |||
| − | |||
| − | |||
</source> | </source> | ||
| + | == Trial result == | ||
<pre> | <pre> | ||
| + | ./run -i | ||
| + | ./run -s | ||
| + | # and in an other console | ||
./run -c | ./run -c | ||
starting gremlin-console ... | starting gremlin-console ... | ||
Revision as of 13:07, 17 September 2019
This mini-tutorial is inspired by this stackoverflow question
The goal is to get access to an apache tinkerpop/gremlin graph database via Python.
Prerequisites
- Java
- Python
- Gremlin-Server
- Gremlin-Console (for debugging)
Installing Java
sudo apt-get install openjdk-8-jre
java -version
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~18.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)
Installing Python and Pip
sudo apt install python2.7
python --version
Python 2.7.15+
sudo apt install python-pip
pip --version
pip 9.0.1 from /usr/lib/python2.7/dist-packages (python 2.7)
Installing Gremlin Server and Console
Trial script
#!/bin/bash
# WF 2019-09-17
# test gremlin-python
# see https://stackoverflow.com/questions/57936915/how-do-i-get-gremlin-python-with-gremlin-server-3-4-3-to-work
version=3.4.3
mirror=http://mirror.dkd.de/apache/tinkerpop/$version
gsd=apache-tinkerpop-gremlin-server-${version}
gcd=apache-tinkerpop-gremlin-console-${version}
# check that the given program is installed
checkinstalled() {
local l_prg="$1"
local l_version="$2"
local l_package="$3"
which $l_prg
if [ $? -ne 0 ]
then
echo "$l_prg is not available - shall i install it from $l_package y/n?"
read x
case $x in
y) sudo apt-get install $l_package;;
*) echo "aborting ..."
exit 1;;
esac
fi
$l_prg $l_version
}
install() {
echo "checking prerequisites ..."
checkinstalled java "-version" "openjdk-8-jre"
checkinstalled python "--version" "python2.7"
checkinstalled pip "--version" "python-pip"
for d in $gsd $gcd
do
if [ ! -d $d ]
then
zip=$d-bin.zip
if [ ! -f $zip ]
then
echo "downloading $zip"
curl -s $mirror/$zip -o $zip
else
echo "$zip already downloaded"
fi
echo "unzipping $zip"
unzip $zip
else
echo "$d already unzipped"
fi
done
}
# commandline option
while [ "$1" != "" ]
do
option=$1
shift
case $option in
-i|--install)
install;;
-s|--server)
echo "starting gremlin-server ..."
#conf=$(realpath $gsd/conf/gremlin-server-modern-py.yaml)
conf=$(realpath $gsd/conf/gremlin-server-modern.yaml)
$gsd/bin/gremlin-server.sh $conf
;;
-c|--console)
echo "starting gremlin-console ..."
$gcd/bin/gremlin.sh
;;
-h|--help)
usage;;
*)
usage;;
esac
done
Trial result
./run -i
./run -s
# and in an other console
./run -c
starting gremlin-console ...
\,,,/
(o o)
-----oOOo-(3)-oOOo-----
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
plugin activated: tinkerpop.tinkergraph
gremlin> g=traversal().withRemote(DriverRemoteConnection('ws://localhost:8182/gremlin','g'))
No signature of method: groovysh_evaluate.DriverRemoteConnection() is applicable for argument types: (String, String) values: [ws://localhost:8182/gremlin, g]
Type ':help' or ':h' for help.