Commit3c15159

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tests: add module import example

Add a simple example on how to import and use `cPickle` from `go-python`.Updates#29.

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Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,7 @@ package main`
`2`	`2`
`3`	`3`	`import (`
`4`	`4`	`"fmt"`
	`5`	`+`
`5`	`6`	`"github.com/sbinet/go-python"`
`6`	`7`	`)`
`7`	`8`
`@@ -17,4 +18,20 @@ func main() {`
`17`	`18`	`pystr:=python.PyString_FromString(gostr)`
`18`	`19`	`str:=python.PyString_AsString(pystr)`
`19`	`20`	`fmt.Println("hello [",str,"]")`
	`21`	`+`
	`22`	`+pickle:=python.PyImport_ImportModule("cPickle")`
	`23`	`+ifpickle==nil {`
	`24`	`+panic("could not import 'cPickle'")`
	`25`	`+}`
	`26`	`+dumps:=pickle.GetAttrString("dumps")`
	`27`	`+ifdumps==nil {`
	`28`	`+panic("could not retrieve 'cPickle.dumps'")`
	`29`	`+}`
	`30`	`+out:=dumps.CallFunctionObjArgs("O",pystr)`
	`31`	`+ifout==nil {`
	`32`	`+panic("could not dump pystr")`
	`33`	`+}`
	`34`	`+fmt.Printf("cPickle.dumps(%s) = %q\n",gostr,`
	`35`	`+python.PyString_AsString(out),`
	`36`	`+)`
`20`	`37`	`}`

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