last lab

labPython/lab3/textfile17.py

@@ -0,0 +1,11 @@
+with open("b.txt", "r") as file:
+    num_this = 0
+    is_subsequence = True
+    lines = file.readlines()
+    num_prev = int(lines[0].replace("\n", ""))
+    for i in range(1, len(lines)):
+        num_this = int(lines[i].replace("\n", ""))
+        is_subsequence = ((num_prev>0)and(num_this<0))or((num_prev<0)and(num_this>0))and(is_subsequence)
+        num_prev = int(lines[i].replace("\n", ""))
+    
+print(is_subsequence)