read files

read_file.py

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+# Different methods to read from text files
+# sr 11/18/2013
+# Python 3.x
+
+# Note: rb opens file in binary mode to avoid issues with Windows systems
+# where '\r\n' is used instead of '\n' as newline character(s).
+
+
+# A) Reading in Byte chunks
+reader_a = open("file.txt", "rb")
+chunks = []
+data = reader_a.read(64)  # reads first 64 bytes
+while data != "":
+    chunks.append(data)
+    data = reader_a.read(64)
+if data:
+    chunks.append(data)
+print (len(chunks))
+reader_a.close()
+
+
+# B) Reading whole file at once into a list of lines
+with open("file.txt", "rb") as reader_b:   # recommended syntax, auto closes
+    data = reader_b.readlines() # data is assigned a list of lines
+print (len(data))
+
+
+# C) Reading whole file at once into a string
+with open("file.txt", "rb") as reader_c:
+    data = reader_c.read() # data is assigned a list of lines
+print (len(data))
+
+
+# D) Reading line by line into a list
+data = []
+with open("file.txt", "rb") as reader_d:
+    for line in reader_d:
+        data.append(line)
+print (len(data))
+
+
+
+
+