diff --git a/TPC4/alunos2.csv b/TPC4/alunos2.csv
new file mode 100644
index 0000000..85a417e
--- /dev/null
+++ b/TPC4/alunos2.csv
@@ -0,0 +1,4 @@
+Número,Nome,Curso,Notas{5},,,,,
+3162,Cândido Faísca,Teatro,12,13,14,15,16
+7777,Cristiano Ronaldo,Desporto,17,12,20,11,12
+264,Marcelo Sousa,Ciência Política,18,19,19,20,18
diff --git a/TPC4/alunos2.json b/TPC4/alunos2.json
new file mode 100644
index 0000000..60f02fa
--- /dev/null
+++ b/TPC4/alunos2.json
@@ -0,0 +1,38 @@
+[
+    {
+        "Número": "3162",
+        "Nome": "Cândido Faísca",
+        "Curso": "Teatro",
+        "Notas": [
+            12,
+            13,
+            14,
+            15,
+            16
+        ]
+    },
+    {
+        "Número": "7777",
+        "Nome": "Cristiano Ronaldo",
+        "Curso": "Desporto",
+        "Notas": [
+            17,
+            12,
+            20,
+            11,
+            12
+        ]
+    },
+    {
+        "Número": "264",
+        "Nome": "Marcelo Sousa",
+        "Curso": "Ciência Política",
+        "Notas": [
+            18,
+            19,
+            19,
+            20,
+            18
+        ]
+    }
+]
\ No newline at end of file
diff --git a/TPC4/alunos3.csv b/TPC4/alunos3.csv
new file mode 100644
index 0000000..cdcc571
--- /dev/null
+++ b/TPC4/alunos3.csv
@@ -0,0 +1,4 @@
+Número,Nome,Curso,Notas{3,5},,,,,
+3162,Cândido Faísca,Teatro,12,13,14,,
+7777,Cristiano Ronaldo,Desporto,17,12,20,11,12
+264,Marcelo Sousa,Ciência Política,18,19,19,20,
diff --git a/TPC4/alunos3.json b/TPC4/alunos3.json
new file mode 100644
index 0000000..f5f9577
--- /dev/null
+++ b/TPC4/alunos3.json
@@ -0,0 +1,35 @@
+[
+    {
+        "Número": "3162",
+        "Nome": "Cândido Faísca",
+        "Curso": "Teatro",
+        "Notas": [
+            12,
+            13,
+            14
+        ]
+    },
+    {
+        "Número": "7777",
+        "Nome": "Cristiano Ronaldo",
+        "Curso": "Desporto",
+        "Notas": [
+            17,
+            12,
+            20,
+            11,
+            12
+        ]
+    },
+    {
+        "Número": "264",
+        "Nome": "Marcelo Sousa",
+        "Curso": "Ciência Política",
+        "Notas": [
+            18,
+            19,
+            19,
+            20
+        ]
+    }
+]
\ No newline at end of file
diff --git a/TPC4/alunos4.csv b/TPC4/alunos4.csv
new file mode 100644
index 0000000..e88adf6
--- /dev/null
+++ b/TPC4/alunos4.csv
@@ -0,0 +1,4 @@
+Número,Nome,Curso,Notas{3,5}::sum,,,,,
+3162,Cândido Faísca,Teatro,12,13,14,,
+7777,Cristiano Ronaldo,Desporto,17,12,20,11,12
+264,Marcelo Sousa,Ciência Política,18,19,19,20,
diff --git a/TPC4/alunos4.json b/TPC4/alunos4.json
new file mode 100644
index 0000000..98838e1
--- /dev/null
+++ b/TPC4/alunos4.json
@@ -0,0 +1,20 @@
+[
+    {
+        "Número": "3162",
+        "Nome": "Cândido Faísca",
+        "Curso": "Teatro",
+        "Notas": 39
+    },
+    {
+        "Número": "7777",
+        "Nome": "Cristiano Ronaldo",
+        "Curso": "Desporto",
+        "Notas": 72
+    },
+    {
+        "Número": "264",
+        "Nome": "Marcelo Sousa",
+        "Curso": "Ciência Política",
+        "Notas": 76
+    }
+]
\ No newline at end of file
diff --git a/TPC4/alunos5.csv b/TPC4/alunos5.csv
new file mode 100644
index 0000000..44b90f7
--- /dev/null
+++ b/TPC4/alunos5.csv
@@ -0,0 +1,4 @@
+Número,Nome,Curso,Notas{3,5}::media,,,,,
+3162,Cândido Faísca,Teatro,12,13,14,,
+7777,Cristiano Ronaldo,Desporto,17,12,20,11,12
+264,Marcelo Sousa,Ciência Política,18,19,19,20,
diff --git a/TPC4/alunos5.json b/TPC4/alunos5.json
new file mode 100644
index 0000000..4d82add
--- /dev/null
+++ b/TPC4/alunos5.json
@@ -0,0 +1,20 @@
+[
+    {
+        "Número": "3162",
+        "Nome": "Cândido Faísca",
+        "Curso": "Teatro",
+        "Notas": 13.0
+    },
+    {
+        "Número": "7777",
+        "Nome": "Cristiano Ronaldo",
+        "Curso": "Desporto",
+        "Notas": 14.4
+    },
+    {
+        "Número": "264",
+        "Nome": "Marcelo Sousa",
+        "Curso": "Ciência Política",
+        "Notas": 19.0
+    }
+]
\ No newline at end of file
diff --git a/TPC4/tpc4.py b/TPC4/tpc4.py
new file mode 100644
index 0000000..ce786d2
--- /dev/null
+++ b/TPC4/tpc4.py
@@ -0,0 +1,65 @@
+import re
+import json
+
+def parse_header(header):
+    regex = re.compile(r"(\w+)(?:{(?:(\d+),)?(\d+)}(?:::(\w+))?)?")
+    capture_list = regex.findall(header.strip())
+
+    header_order = []
+    lists = {}
+    funcs = {}
+
+    for id, min, max, func in capture_list:
+        header_order.append(id)
+        if max != "":
+            lists[id] = (int(min) if min else max, int(max))
+        if func != "":
+            funcs[id] = func
+    return header_order, lists, funcs
+
+
+def parse_data(lines, header_order, lists, funcs):
+    data_regex = ""
+    for id in header_order:
+        if id in lists:
+            min, max = lists[id]
+            if min == max:
+                num = '{' + str(max) + '}'
+            else:
+                num = '{' + str(min) + ',' + str(max) + '}'
+            data_regex +=  rf"(?P<{id}>([^,]+,?){num}),?"
+        else:
+            data_regex += rf"(?P<{id}>[^,]+),?"
+    data_regex = re.compile(data_regex)
+    
+    data = []
+    for line in lines:
+        for match in data_regex.finditer(line.strip()):
+            data.append(match.groupdict())
+    
+    for elem in data:
+        for id in header_order:
+            if id in lists:
+                elem[id] = [int(num) for num in re.findall(r"\d+",elem[id])]
+            if id in funcs:
+                if funcs[id] == "sum":
+                    elem[id] = sum(elem[id])
+                elif funcs[id] == "media":
+                    elem[id] = sum(elem[id]) / len(elem[id])
+    
+    return data
+
+
+def main():
+    for i in range(2,6):
+        test_file = f"alunos{i}"
+        f = open(f"{test_file}.csv", "r")
+        lines = f.readlines()
+        header_order, lists, funcs = parse_header(lines[0])
+
+        data = parse_data(lines[1:], header_order, lists, funcs)
+        json_file = open(f"{test_file}.json","w")
+        json.dump(data,json_file,indent=4,ensure_ascii=False)
+
+if __name__ == "__main__":
+    main()