# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"(<a\b[^<]*?|(?<!^)\G)([^\/]*?)%20(?=(?![^\/]*\.jpg\">)[^\/\"]*\">)"
test_str = "<a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/34%20-%20kv34%20-%20tomba%20di%20thumtmose%20iii\"> KV34 Tomba di Thutmose III</a>:</b> Nella foto, la pianta della tomba</font></p> </td> </tr> </tbody></table> </div> <div align=\"center\"> <div align=\"center\"> <table border=\"1\" width=\"96%\" id=\"table4\"> <tbody align=\"left\"><tr> <td width=\"11%\" align=\"center\"> <a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/06%20antichi%20egizi%20-%20Tomba%20di%20Amenofi.jpg\"> <img border=\"0\" src=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/06%20antichi%20egizi%20-%20Tomba%20di%20Amenofi%20ante.jpg\" width=\"80\" height=\"64\" alt=\"/06 antichi egizi - Tomba di Amenofi\" /></a></td> <td width=\"87%\" class=\"style4\"> <p class=\"style3\"> <b><a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/35%20KV35%20Tomba%20di%20Amenofi%20II\">KV35 Tomba di Amenofi II</a>; </b> Nella foto, il re davanti alla dea Hathor che gli offra il segno della vita.</p> </td> </tr> <tr> <td width=\"11%\" align=\"center\"> <a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/24%20antichi%20egizi%20-%20tomba%20di%20Horemhab.jpg\"> <img border=\"0\" src=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/24%20antichi%20egizi%20-%20tomba%20di%20Horemhab%20ante.jpg\" width=\"80\" height=\"59\" alt=\"24 antichi egizi - tomba di Horemhab\" /></a></td> <td width=\"87%\" class=\"style4\"> <div class=\"style3\"> <b><a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/57%20kv57%20tomba%20di%20horemhab\"> KV 57Tomba di Horemhab</a><font face=\"Arial\" size=\"2\">: </font></b><font face=\"Arial\" size=\"2\">Nella foto, il faraone è raffigurato di fronte a varie divinità</font></div> </td> </tr> <tr> <td width=\"11%\" align=\"center\"> <a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/09%20antichi%20egizi%20-%20Tomba%20di%20Tutankhamen.jpg\"> <img border=\"0\" src=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/09%20antichi%20egizi%20-%20Tomba%20di%20Tutankhamen%20ante.jpg\" width=\"80\" height=\"92\" alt=\"09 antichi egizi - Tomba di Tutankhamen\" /></a></td> <td width=\"87%\" class=\"style4\"> <b><a href=\"http://example.com/path/to-some-folder/another%20folder/one%20more520folder/uploads/2012/02/some%20folder/another%20folder/62%20kv62%20tomba%20di%20tutankhamen\">KV62 Tomba di Tutankhamen:</a></b> Nella foto, <font face=\"Arial\" size=\"2\">un particolare della decorazione, con la barca solare ed i babbuini che alludono alla prima ora del libro dell'Amduat.</font></td> </tr> <tr> <td"
subst = "\\1\\2-"
# You can manually specify the number of replacements by changing the 4th argument
result = re.sub(regex, subst, test_str, 0)
if result:
print (result)
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html