Add day 1 part 1 (in python)

day-1/day-1.py

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+#!/usr/bin/env python3
+with open('day-1/input', 'rt') as f:
+    numbers = []
+    for line in f:
+        for char in line:
+            if str.isdigit(char):
+                digit1 = char
+                break
+
+        for i in range(len(line) - 2, -1, -1):
+            if str.isdigit(line[i]):
+                digit2 = line[i]
+                break
+        
+        numbers.append(int(digit1 + digit2))
+
+total = 0
+for num in numbers:
+    total += num
+print(total)

day-1/readme.md

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+1. Combine the first and last digit on each line to create a single two-digit number.
+2. Get the sum of all of those
+
+Input:
+
+```txt
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet
+```
+
+(12, 38, 15, 77)
+
+Output:
+
+```txt
+142
+```