A command-line interface for Neo4j's graph query language, Cypher.
If you haven't already, download and install Neo4j. Then, install cycli:
$ pip install cycli
To start, simply execute cycli from your terminal. Neo4j needs to be running.
$ cycli
If you have Neo4j authentication enabled, you'll need to pass a username.
$ cycli -u username
You will then be prompted to enter your password. For more options, execute cycli --help.
$ cycli --help
Usage: cycli [OPTIONS]
Options:
-v, --version Show cycli version and exit.
-h, --host TEXT The host address of Neo4j.
-P, --port TEXT The port number on which Neo4j is listening.
-u, --username TEXT Username for Neo4j authentication.
-p, --password TEXT Password for Neo4j authentication.
-t, --timeout INTEGER Set a global socket timeout for queries.
-l, --logfile FILENAME Log every query and its results to a file.
-f, --filename FILENAME Execute semicolon-separated Cypher queries from a
file.
-s, --ssl Use the HTTPS protocol.
-r, --read-only Do not allow any write queries.
--help Show this message and exit.
The smart autocompletion suggests node labels when you're drawing a node, relationship types when you're drawing a relationship, and properties when working with identifiers. Of course, it also suggests all of the Cypher keywords, functions, and predicates.
Cypher keywords are displayed in a probabilistic order based on your most recent keyword.
If you type (, [, {, ", or ', a matching closing character is automatically placed to the right of your cursor.
Catch syntax errors with the built-in syntax highlighting. The colors were chosen to emulate the syntax highlighting available in the Neo4j browser.
Execute queries by ending them with a semicolon and pressing enter or by pressing enter twice.
Type "help" to see a table of keywords / keystrokes and their descriptions.
| Keyword | Description |
|---|---|
| quit | Exit cycli. |
| exit | Exit cycli. |
| help | Display this text. |
| refresh | Refresh schema cache. |
| run-n | Run a Cypher query n times. |
| export | Set a parameter with export key=value. |
| schema | Display indexes, constraints, labels, and relationship types. |
| schema-indexes | Display indexes. |
| schema-constraints | Display constraints. |
| schema-labels | Display labels. |
| schema-rels | Display relationship types. |
| CTRL-D | Exit cycli if the input is blank. |
| CTRL-C | Abort and rollback the currently-running query. |
Run a Cypher query n times. This is useful for large updates, e.g. if you want to update a property in batches.
> MATCH (n) RETURN COUNT(*);
| COUNT(*)
---+----------
1 | 456
26 ms
Let's say we want to add a new property in batches of 100. If we have 456 nodes, we'll need to run the same Cypher query 5 times.
> run-5 MATCH (n)
WHERE NOT HAS(n.newProperty)
WITH n LIMIT 100
SET n.newProperty = "Hello World"
RETURN COUNT(*);
| COUNT(*)
---+----------
1 | 100
Run 1: 44 ms
| COUNT(*)
---+----------
1 | 100
Run 2: 8 ms
| COUNT(*)
---+----------
1 | 100
Run 3: 8 ms
| COUNT(*)
---+----------
1 | 100
Run 4: 10 ms
| COUNT(*)
---+----------
1 | 56
Run 5: 9 ms
Total duration: 79 ms
Set parameters with export key=value.
> export name="Tom Hanks"
> export year=2005
> env
name=Tom Hanks
year=2005
> MATCH (p:Person {name:{name}})-[:ACTED_IN]->(m:Movie)
WHERE m.released > {year}
RETURN m.title, m.released;
| m.title | m.released
---+----------------------+------------
1 | Charlie Wilson's War | 2007
2 | Cloud Atlas | 2012
3 | The Da Vinci Code | 2006
12 ms
The value is evaluated with Python's eval, so you can also do things like this:
> export evens=[x for x in range(10) if x % 2 == 0]
> env["evens"]
[0, 2, 4, 6, 8]
This project depends heavily on python-prompt-toolkit and py2neo. I also frequently reference the pgcli and mycli projects for ideas and troubleshooting help. The logo was designed by Greta Workman. =)
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