Sample code for 30+ languages & platforms
CkPython Requires Chilkat v11.7.0+

PDF Placeholders with Other Delimiters: [[name]]

See more PDF Text Replacement Examples

Demonstrates the "placeholderSyntax" option. Placeholders are {{name}} by default; a template written with other delimiters, such as [[name]] or <>, says so with placeholderSyntax, written around the word "name".

Chilkat CkPython Downloads

CkPython
import sys
import chilkat

success = False

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example is available at letter_template.pdf

pdf = chilkat.CkPdf()
success = pdf.LoadFile("qa_data/pdf/letter_template.pdf")
if (success == False):
    print(pdf.lastErrorText())
    sys.exit()

#  The letter reads: "Dear [[name]]," ... "expires on [[expiry]]" ... "[[amount]] per year" ... "[[agent]]".
json = chilkat.CkJsonObject()
json.UpdateString("placeholderSyntax","[[name]]")
json.UpdateString("placeholders.date","October 18, 2026")
json.UpdateString("placeholders.name","Ms. Rivera")
json.UpdateString("placeholders.expiry","December 31, 2026")
json.UpdateString("placeholders.amount","$299.00")
json.UpdateString("placeholders.agent","Dana Whitfield, Account Manager")

jsonOut = chilkat.CkJsonObject()
success = pdf.TextReplace("apply",json,jsonOut)
if (success == False):
    print("Not applied: " + jsonOut.emit())
    if (success == False):
        print(pdf.lastErrorText())
        sys.exit()

i = 0
count_i = jsonOut.SizeOfArray("replacements")
while i < count_i :
    jsonOut.put_I(i)
    print("[[" + jsonOut.stringOf("replacements[i].field") + "]] replaced")
    i = i + 1

success = pdf.WriteFile("qa_output/letter_rivera.pdf")
if (success == False):
    print(pdf.lastErrorText())
    sys.exit()

#  Sample output:

#  [[date]] replaced
#  [[name]] replaced
#  [[expiry]] replaced
#  [[amount]] replaced
#  [[agent]] replaced