如何去除字符串解析时的空格？及文本文件数字解析存储问题

Hey there! Let's break down your questions clearly and give you practical, actionable solutions.

Depending on where the spaces appear and your specific needs, here are a few go-to methods:

• Trim leading/trailing spaces: Use strip() to wipe whitespace from the start and end of a string. Example:

  s = "  sample string  "
  cleaned_s = s.strip()  # Result: "sample string"
  

• Remove all spaces entirely: Use replace() to swap every space with an empty string:

  s = "s p a c e d   o u t"
  no_space_s = s.replace(" ", "")  # Result: "spacedout"
  

• Collapse and remove all whitespace: If dealing with multiple spaces, tabs, or newlines, combine split() and join()—split() with no arguments splits on any whitespace, then joining with an empty string eliminates all gaps:

  s = "hello   world\nwith\ttabs"
  cleaned_s = "".join(s.split())  # Result: "helloworldwithtabs"
  

• Regex for complex whitespace patterns: Use the re module to replace any sequence of whitespace characters:

  import re
  s = "  messy   string  "
  cleaned_s = re.sub(r"\s+", "", s)  # Result: "messystring"
  

Since you mentioned using split(), let's use Python to implement this solution step by step.

First, assume your input line (after reading from the text file) looks like this:

line = "1.000000 1:-0.362772 2:-0.314085 3:-0.177185 4:0.898650 5:-0.154588"

Here's how to parse it into your three target variables:

# Split the line into individual segments using spaces as separators
parts = line.split()

# Convert the first segment to an integer (handle the .000000 format via float first)
output = int(float(parts[0]))

# Initialize empty lists to store numbers and values
number = []
value = []

# Process each number-value pair segment
for item in parts[1:]:
    # Split each item on the colon to separate the number and value strings
    num_str, val_str = item.split(":")
    # Convert and append to the respective lists
    number.append(int(num_str))
    value.append(float(val_str))

What this does: #

• line.split() breaks the full string into a list of segments (e.g., "1.000000", "1:-0.362772", etc.)
• Converting parts[0] via float() then int() safely handles the decimal-formatted initial integer, turning 1.000000 into 1
• Looping through the remaining segments and splitting on ":" lets us separate each number-value pair, convert them to the correct data types, and populate your target lists.

After running this code, you'll have exactly what you need:

• output = 1
• number = [1, 2, 3, 4, 5]
• value = [-0.362772, -0.314085, -0.177185, 0.898650, -0.154588]

内容的提问来源于stack exchange，提问作者Kim Gary